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2 years ago

1. Express 30 out of 40 and 40 out of 50 as a percentage. Which is the better score?

Mathematics

1 answer:

Ymorist [56]2 years ago

5 0

Answer:

30 out of 40: 75%

40 out of 50: 80%

40 out of 50 is the better score

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Need help with this please I am in math class

Tpy6a [65]

Answer:

256.8

Step-by-step explanation:

the tenths place is the first number after the decimal.

7 0

2 years ago

Find the volume of a pyramid with a square base, where the perimeter of the base is 8.2\text{ cm}8.2 cm and the height of the py

7nadin3 [17]

Answer:

$V=18.2cm^3$

Step-by-step explanation:

The volume of the pyramid is given by:

$V=\frac{A_{b}h}{3}$

where $A_{b}$ is the area of the base and $h$ is the height.

We know that the height is:

$h=13cm$

Thus we need to find the area of the square at the base.

The perimeter of the square is:

$p=8.2cm$

this means that the length of the sides of the square is :

$l=\frac{p}{4}\\ \\l=\frac{8.2cm}{4}\\ \\l=2.05cm$

Now we can find the area of the base which the area of the square:

$A_{b}=l^2\\A_b=(2.05cm)^2\\A_b=4.2025cm^2$

and finally we find the volume:

$V=\frac{A_{b}h}{3}$

$V=\frac{(4.2025cm^2)(13cm)}{3}\\ \\V=\frac{54.6325cm^3}{3}\\ \\V=18.2108cm^3$

Which rounded to the nearest tenth of a cubic centimeter is: $V=18.2cm^3$

3 0

2 years ago

If the simple interest on $3000 for 8 years is $1680, then what is the interest rate?

Fiesta28 [93]

R=i/pt
R=1680/3000*8=1,680÷24,000
=0.07*100=7%

3 0

3 years ago

What are lines that intersect from right angles

Alex777 [14]

Answer:

Two lines that intersect and form right angles are called perpendicular lines. The symbol ⊥ is used to denote perpendicular lines.

3 0

3 years ago

What is the rate of change for the numbers 3,5,7,9

JulsSmile [24]

Answer:

Plus 2 (+2)

Step-by-step explanation:

The rate of change is always a constant change from the given first term to the next one. In this case, you are adding 2 each time:

3 + 2 = 5

5 + 2 = 7

7 + 2 = 9

etc.

6 0

2 years ago

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