Select the correct way to write 0.28 as a fraction.

Answers

Answer 1

Answer: 7/25 is equal to 0.28

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2 step equation that equals 10

If an area in the form of a circle is to be roped off by a rope 10 m long, what will be the radius of this area? Round your answer to two decimal places. A. 1.59 m
B. 2.56 m
C. 3.18 m
D. 0.31 m

Answers

Answer:

A. 1.59 m

Step-by-step explanation:

To find the radius of the area we wil; simply use the formula; C = 2π R

where C is the circumference of the circle, π is a constant that is always 3.14 approximately, except given otherwise and R is the radius.

From the question, since the circle is formed by roping off a rope 10 m long, then it implies that the circumference (c) = 10

We can now proceed to substitute our values into the formula;

C = 2π R

10 ≈ 2×3.14×R

10 ≈ 6.28R

Divide both-side of the equation by 6.28

$(10)/(6.28) = (6.28 R)/(6.28)$

(At the right-hand side of the equation 6.28 will cancel-out 6.28 leaving us with just R while at the left-hand side of the equation, 10 will be divided by 6.28)

1.592≈R

R≈1.59 m

Therefore, the radius of this area will be 1.59 m

Your answer is A. 1.59 m.

Hope this helps.

PLEASE HELP!! 30 Points :) A student wants to know how many 1cm squares are needed to completely cover all the sides of a 10 cm by 8 cm by 12 cm box.

What measure is the student trying to calculate?

• Volume

• Height

• Surface Area

• Perimeter

Answers

Answer:

Surface Area is the correct Answer

Step-by-step explanation:

Hope this helps

20. The temperature of a pot of water is 62*F. The temperature increasesby 20*F per minute when being heated. Write an equation to represent

the linear relationship. *

Answers

Given :

The temperature of a pot of water is 62 F .

The temperature increases by 20 F per minute when being heated .

To Find :

Write an equation to represent the linear relationship.

Solution :

Here , the temperature is increasing directly with the time .

Therefore , it is a linear equation .

Let temperature varies with as :

T = at+b .... equation 1 .

( Here , a and b are constants )

Now , at t= 0 min .

$T = 62 =a* 0 + b$

$b=62$

Now , after 1 min temperature will be , T = 62 +20 =82 F

$T = 82 = a* 1+62\na=20$

Putting value of a ans b in equation 1 , we get :

$T=20t+62\ F$

Hence , this is the required relation .

The volume of a cube can be written as a function of its edge length, V(x) = x^3. Which is a correct interpretation of V(2x)?(A) The volume of a cube doubles when its edge length doubles.
B) The volume of a cube increases by a factor of 4 when its edge length doubles.
©
The volume of a cube increases by a factor of 6 when its edge length doubles.
D The volume of a cube increases by a factor of 8 when its edge length doubles.

Answers

Answer:

D The volume of a cube increases by a factor of 8 when its edge length doubles

Step-by-step explanation:

Volume of a cube is represented by the function

$V(x)=x^3$

where $x$ represents the edge length of the cube

Now when $x=2x$ i.e., when the edge length is doubled we have

$V(2x)=(2x)^3\n\Rightarrow V(2x)=8x^3\n\Rightarrow V(2x)=8(V(x))$

It can be seen that the volume of the cube increased by 8 times when edge length doubles.

Answer:

the answer is d

Step-by-step explanation:

Divide 85 into the ratio of 2:3:5

Answers

The actual amount that needs to be divided = 85
The ratio in which the amount needs to be divided = 2:3:5
Let us assume the common ratio to be = x
Then
2x + 3x + 5x = 85
10x = 85
x = 85/10
= 8.5
Then
The ratio in which the number 85 will be divided = 2 * 8.5:3 * 8.5:5 * 8.5
= 17:25.5:42.5
So from the above deduction we can see that the number 85 can be divided in the ratio 17:25.5:42.5

What is the sum of the polynomials? (6x+7+x^2)+(2x^2-3)