Work out
(8×10^-2)−(4×10^-4)
Give your answer in standard form.

Answers

Answer 1

Answer:

7.96 x 10^2

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Answer 2

The standard form of [tex]8\times10^{-2} - 4\times10^{-4}[/tex] is [tex]\frac{38}{5000}[/tex].

What is a numerical expression?

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, [tex]8\times10^{-2} - 4\times10^{-4}[/tex].

[tex]= \frac{8}{10^2} - \frac{4}{10^4}[/tex].

[tex]= \frac{8}{100} - \frac{4}{10000}[/tex].

[tex]= \frac{80 - 4}{10000}[/tex].

[tex]= \frac{76}{10000}[/tex].

[tex]= \frac{38}{5000}[/tex].

learn more about numerical expressions here :

https://brainly.com/question/29199574

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Related Questions

A family membership at a tennis club costs a flat fee of $150, plus $25 per person. If n stands for the number of people join, write an equation that represents this situation.

Answers

150 + 25x in the equation x is how many people are on the subscription plus the base of 150

Answer:

the equation is 150 + 25n

please help ill mark brainliest!

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Answer:

subject?

Step-by-step explanation:

Step-by-step explanation:

you can look at the image.

what is the simplified form of (x + 3)²​

Answers

Answer:

x^2+6x+9

Step-by-step explanation:

expand the expression

You are shot out of a cannon at the fair. The equation y=-1/5(x+2) (x-28) models your flight path, where y is the height above the ground and x is the horizontal distance. Which of the following statements in the comments are true?
a) You reach a maximum height of 45 feet
b) You will land 11.2 feet from the cannon
c) The barrel of the cannon is about 11 feet above the ground.
d)At a point 13 feet from the cannon, you begin to descend.

Answers

Q: You are shot out of a cannon at the fair. The equation y=-1/5 * (x+2) (x-28) models your flight path, where y is the height above the ground and x is the horizontal distance. Which of the following statements in the comments are true?

a) You reach a maximum height of 45 feet,

b) You will land 11.2 feet from the cannon,

c) The barrel of the cannon is about 11 feet above the ground.

d)At a point 13 feet from the cannon, you begin to descend.

A: When y = 0, x = 28

y’ = 0 at x = 13 where Y is max = 15^2 / 5 = 45

Hence a is true, b is false, c is false, d is false .

3. The amount was $120 at 5% rate for 4
years.

Answers

Answer:

Go to photo math thank me later

Step-by-step explanation:

dowload tha app on ur phone

Plot c so its distance from the origin is 1. Plot poin e 4/5 closer to the origin than c. What is its cooridinate?

Answers

Answer:

[tex]C = (1,0)[/tex]

[tex]E = (0.8,0)[/tex]

See attachment for C and E

Step-by-step explanation:

Given

[tex]O= (0,0)[/tex] --- Origin

[tex]CO = 1[/tex] --- distance of C to O

Solving (a): Plot point C

Calculate the coordinates of C using distance formula:

[tex]d = \sqrt{(x_2 - x_1)^2 + (y_2 -y_1)^2}[/tex]

Where:

[tex]O= (0,0)[/tex] ---[tex](x_1,y_1)[/tex]

[tex]C = (x,y)[/tex] -- [tex](x_2,y_2)[/tex]

[tex]d = CO = 1[/tex]

So, we have:

[tex]1 = \sqrt{(x - 0)^2 + (y -0)^2}[/tex]

[tex]1 = \sqrt{x^2 + y^2}[/tex]

Square both sides

[tex]1^2 = x^2 + y^2[/tex]

[tex]x^2 + y^2 =1[/tex]

For this solution, we assume y = 0

[tex]x^2 + 0^2 =1[/tex]

[tex]x^2=1[/tex]

Solve for x

[tex]x = 1[/tex]

So, the coordinates of C is: (1,0)

[tex]C = (1,0)[/tex]

Solving (b): Plot point E

We have that E is 4/5 closer to the origin.

This implies that, the ratio is:

[tex]m : n = 4/5:1/5[/tex]

Multiply by 5

[tex]m : n = 4:1[/tex]

So, E is at 4:1 between O and C

Calculate the coordinates of E using:

[tex]E = (\frac{mx_2 + nx_1}{m + n},\frac{my_2 + ny_1}{m + n})[/tex]

Where

[tex]O= (0,0)[/tex] ---[tex](x_1,y_1)[/tex]

[tex]C = (1,0)[/tex] --- [tex](x_2,y_2)[/tex]

[tex]m : n = 4:1[/tex]

[tex]E = (\frac{4*1 + 1 * 0}{4 + 1},\frac{4*0 + 1*0}{4 + 1})[/tex]

[tex]E = (\frac{4}{5},\frac{0}{5})[/tex]

[tex]E = (0.8,0)[/tex]

Peter has a coupon for 15% off the price of any item in a sporting goods store. He wants to buy a pair of shoes that are priced at $36.99. About how much will the shoes cost after the discount.

Answers

Answer:

$31.43

Step-by-step explanation:

If you take 15% of 36.99 you get around 5.56. So all you have to do is subtract that from the original amount.

PLEASE HELP ME !! HELPP !!!!!

Answers

Answer:

3.7x1.2=3+0.7+0.6+0.34=4.44

Step-by-step explanation:

Find the area of the figure.

Answers

Answer:

37.5 Units

Step-by-step explanation:

Can yall pleas help me with this!!!!!!!

Answers

Answer:

5. Obtuse 6. Right 7. Straight 8. Acute 9. Acute 10. Right

so quick explanation acute is smaller than 90 degrees right angle is exactly 90 degrees an obtuse angle is over 90 degrees and a straight angle is 180 degrees also straight

Help me with math. Don't put a link i will REPORT you.

Answers

Answer:

4, 20, 2

Step-by-step explanation:

The relationship between x and y is multiplication by 4:

9*4 = 36

4*4 = 16

5*4 = 20

2*4 = 8

Answer:

hi!

your answer would be 4, 20, 2

hope this help! have a nice day/night/morning/afternoon

Step-by-step explanation:

A sign made of solid wood is in the shape of a pyramid. The base is a triangle with a base of 6 feet and a height of 4 feet. The height of the sign is 7 feet. The wood costs $3 per cubic foot. What is the cost of the sign?

Answers

Answer:

$144

Step-by-step explanation:

Volume of the pyramid = 1/3BH

Base area B = 1/2 * 6 * 4

Base area B = 12 ft²

Height H = 4ft

Volume of the pyramid = 12 * 4

Volume of the pyramid = 48ft³

SInce 1 ft³ = $3

48ft³ = x

Cross multiply

x = 3 * 48

x = 144

Hence the cost of the sign is $144

solve for x and create model

Answers

X is 1 not really sure about the model tho

which is greater ? 5/13 , 45%

Answers

Answer:

45% is greater than 5/13

Step-by-step explanation:

i hope this helps :)

Answer:

45% is greater.

Step-by-step explanation:

45% is greater because 5/13 as a percentage is roughly 38 percent which is smaller than 45%.

What is 2.712264 rounded to the nearest cent?
marking brainliest

Answers

Answer:2.7

Step-by-step explanation:trust me

Answer:

2.71-----------------

among drivers insured by an insurance company 64% are women, 35% of the drivers are in a high risk catergory, and 20% of the drivers are high risk women. if a driver is randomnly selected from that company, what is the probability that the driver is either high risk or a woman

Answers

Answer:

2/3

Step-by-step explanation:

What is the midpoint of the longest side of the triangle with vertices (1,4),(3, 4), and (3, 6)?
A, (1, 1)
B, (2, 4)
С, (2,5)
D,(3,5) ​

Answers

Answer:

(2, 5)

Step-by-step explanation:

The longest side of the triangle will be the side with the coordinate (1,4) and (3,6) due the value of the distance between them;

Midpoint = (x1+x2/2, y1+y2/2)

X = 1+3/2

X = 4/2

X = 2

Y = 4+6/2

Y = 10/2

Y = 5

Hence the required midpoint (X, Y) will be at (2, 5)

how many books can you read in 56 months ??

Answers

Answer:

depends what type of books you mean and the pace you can read so theres no right or wrong answer cause everyone is at different levels when it comes to reading

Answer:

weird answer but if it where only chapter books ill read 20

if it where regular books i would read 50

find the surface area

Answers

Answer:

210.6 [tex]in^{2}[/tex]

Step-by-step explanation:

Area of  bottom triangle = bh/2 = 9(7.8)/2 = 35.1

Measure of 1 lateral face = 13(9)/2 = 58.5

Total measure of all 3 lateral faces = 3(58.5) = 175.5

Surface area = 35.1 + 175.5 = 210.6 [tex]in^{2}[/tex]

A pilot takes a taxi from the airport to a hotel. The taxi driver charges a 2.50 initial charge +2.65 per mile. Which equation can be used to find why the total cost of the trip if X represents the number of miles of the trip

Answers

Answer:

J

Step-by-step explanation:

It has an initial charge of 2.50 dollars so you have to pay that before you calculate your miles which is 2.65x. X = the amount of miles you plug into the equation.

The answer is j have a great day



ANYONE COULD HELP ME WITH THIS PLEASE!

Answers

I think it is A I remember doing this question and when I put A I got it right

The circle below is centered at the origin and has a radius of 7. What is its
equation?
10
-10
10
- 10
O A. x²-7=7
B. x2 + y2 = 49
c. x2 - y2 = 49
D. x² + 7 = 7

HELPPP ASAPPP

Answers

Answer:

x^2 +y^2 = 49

Step-by-step explanation:

The equation for a circle is

(x-h)^2 + (y-k)^2 = r^2  where (h,k) is the center of the circle and r is the radius

( x-0)^2 + (y-0)^2 = 7^2

x^2 +y^2 = 49

help me pls! i'll mark u brainliest promised

Answers

Answer:

DF≅YZ

angle R≅angle N

XW≅TH

angle M ≅angle C

new coordinate=(2,1)

new coordinate=(0,2)

Reflection:

new coordinate=(5,-6)

new coordinate=(1,4)

Last one is already done

Step-by-step explanation:

Someone help me pls

Answers

the answer is A

5^-8 × 5^4= 5^-8+4

= 5^-4

= 1/5^4

Please help immediately and please show working

Answers

Answer:

x = 9

y = [tex]9\sqrt{2}[/tex]

Step-by-step explanation:

Since there is a 45° angle and a 90° angle, this is a isosceles triangle, therefore x = 9 and you can find y by pithagoras:

9² + 9² = y²

81 + 81 = y²

y = [tex]\sqrt{162}[/tex]

[tex]y=\sqrt{2 * 81}[/tex]

[tex]y=\sqrt{2 * 9^2}[/tex]

[tex]y=9\sqrt{2}[/tex]

show that the equation x^3+4x=1 has a solution between x=0 and x=1

Answers

302/720^8293910374/6272028373729203

Jacob is traveling to North Carolina for vacation. He travels a total of 456 miles in 8 hours, what is his average speed?​

Answers

Answer:

57 miles per hour

Step-by-step explanation:

Find his average speed by dividing the total of miles he traveled by the number of hours:

456/8

= 57

So, this means he traveled 57 miles in one hour.

His average speed was 57 miles per hour

can someone please tell me how to do this!?!?!? i have no clue if im getting this right

Answers

Answer:  20/101

=================================================

Explanation:

The sine ratio involves the opposite side over the hypotenuse

For reference angle E, the opposite side is the unknown vertical side, which we'll call x for now.

The known leg is 99 and the known hypotenuse is 101. We'll use these two bits of info to find x. Apply the pythagorean theorem:

a^2 + b^2 = c^2

x^2 + 99^2 = 101^2

x^2 + 9801 = 10201

x^2 = 10201-9801

x^2 = 400

x = sqrt(400)

x = 20

The missing vertical side of the triangle is 20 units. Now we can apply the sine ratio to find sin(E)

sin(angle) = opposite/hypotenuse

sin(E) = 20/101

This fraction cannot be reduced further. This is because 20 = 2*2*5, and neither 2 nor 5 is a factor of 101.

HI EVERYONE THE PROBLEM IS: 18 = 5 - y. (WE'RE DOING TWO-STEP EQUATIONS)

Answers

Answer:

y = -13

I like two step equations

Step-by-step explanation:

Equation :

18 = 5-y

Im just going to flip it around because it feels more comfortable

5-y = 18

Add y to both sides

5 = 18 + y

Subtract 18 from both sides

-13 = y

y = -13

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

[tex]18 =5 - y \\ y = 5 - 18 \\ y = - 13 \\ thank \: you[/tex]

what are the difference in finding the cirumference circle and finding the area of circle

Answers

Answer:

the circumference is the total distance round a circle but the are is a measure of a space or region inside the circle but circumference is around it

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