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3 years ago

Hey(: can somebody please help me with this question please !

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

6 0

The volume of a cone is 1/3 pi r^2 h. So by substitution, V = 1/3 of 80pi which simplifies to V=26.667pi, which when multiplied out, provides the answer V = 83.8 cubic meters.

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The parallel sides of a trapezoid measure 13.5 inches and 6.5 inches. The legs of the trapezoid are 4 inches and 7 inches. The h

belka [17]

Answer:

31 inches. Add all the sides together. The height is not needed. 6.5+13.5+4+7=31 inches.

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

A semicircle has an area of 76.97 squared km. Find it’s radius

shtirl [24]

Answer:

7 km

Step-by-step explanation:

Substitute:

The equation for area of a semi-circle is $\frac{r^{2}\pi }{2}$

A = $\frac{r^{2}\pi }{2}$

76.97 = $\frac{r^{2}\pi }{2}$

Multiply by 2 on both sides:

2(76.97) = ( $\frac{r^{2}\pi }{2}$ )2

153.94 = $r^{2} \pi$

Divide by pi on both sides:

153.94 = $r^{2} \pi$

/pi /pi

49.03 ≈ $r^{2}$

Find the square root:

$\sqrt{49.03} =\sqrt{r^{2} }$

7 = r

7 0

3 years ago

5. Algebra Write an expression you can

AveGali [126]

Answer:

y=x^3

Step-by-step explanation:

I don't know y sha

6 0

3 years ago

Please explain how you got your answer (:

melisa1 [442]

I used math

anyway
remember you can do anything to an equation as long as you do it to both sides

so

4n+2 and 1/2=2n+5
minus 2n both sides
4n-2n+2 and 1/2=2n-2n+5
2n+2 and 1/2=0+5
2n+2 and 1/2=5
minus 2 and 1/2 both sides
2n=2 and 1/2
divide both sides by 2
I mean times both sides by 1/2
n=1 and 1/4

answer is C

6 0

3 years ago

During a flu epidemic, 44 students out of the 80 who are in Ms Grant’s class were absent. What percent were absent?

wel

44/80 x 100
=0.55 x 100
=55%

8 0

3 years ago

Read 2 more answers