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2 years ago

Can you plezzzzzzzzzzzzzzzz help me?

Mathematics

1 answer:

allsm [11]2 years ago

5 0

The formula for volume of a cylinder is V = pi r^2 h. You put the numbers into the formula, and you get 25.13. So the volume of the cylinder is 25.13. The formula for volume of a cone is V = pi r^2 h/3. You put the numbers into the formula, and you get 12.57. The volume of the cone is 12.57. Then, you add the volumes of the two shapes together. 25.13 + 12.57 = 37.7. You have to round it to the nearest whole number, so since 7 is greater than 5, you round up to 38. 38 mm is the answer.

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2 years ago

URGENT!!!! The area of a rectangular floor is 80 square feet. The length of the floor is 2 feet less than the width of the floor

KatRina [158]

Answer:

The width of the floor is 10 ft.

Step-by-step explanation:

First, you have to form expressions of width and length in terms of w. With the given information :

width = w ft

length = (w - 2) ft

Given that the area of rectange is A = length × width so you have to subtitute the expressions and value into the formula :

A = l × w

80 = (w - 2) × w

w(w - 2) = 80

w² - 2w = 80

w² - 2w - 80 = 0

(w + 8)(w - 10) = 0

w + 8 = 0

w = -8 (rejected)

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3 0

2 years ago

Ricky has 3/4 of a bag of Skittles. He wants to split the rest between between his 5 friends. What fraction of the bag will each

Wittaler [7]

Answer:

3/20, with the assumptions below.

Explanation:

The question seems incomplete.

In order to show you the procedure, I make some assumptions.

Assuming that Ricky wants to split the full content of the 3/4 of a bag between his 5 friends, to find what fraction of the bag will each friend receive you must divide 3/4 by 5.

The operation is:

$\dfrac{3}{4}\div 5$

Convert the whole number 5 into fraction using 1 as denominator:

$\dfrac{3}{4}\div \dfrac{5}{1}$

Transform the division into multiplication changing the divisor into its reciprocal:

$\dfrac{3}{4}\times \dfrac{1}{5}$

Multiply numerator with numerator and denominator with denominator:

$\dfrac{3\times 1}{4\times 5}=\dfrac{3}{20}\leftarrow answer$

7 0

3 years ago