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2 years ago

Elijah calculated the area of a circle to be 900π units². Which of the following was the radius of the circle?

Mathematics

1 answer:

scZoUnD [109]2 years ago

7 0

Answer: A. 30

Step-by-step explanation:

The formula for the area of a circle is pi*r^2, where r is the radius of the circle.

900pi = pi*r^2

Divide both sides by pi.

900 = r^2

Square root both sides.

r = +/- 30.

Since the radius cannot be negative, the answer is 30 units.

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Step-by-step explanation:

The given expression is

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2 years ago

A drink is made by mixing pineapple juice , orange juice and line juice in the ratio 2:7:3 Sally makes 600ml of the drink

Tresset [83]

Sally has 600 ml of drink
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When it is mixed at a ratio of 2:7:3 . . .pineapple:orange:lime (respectively) . . this means . . . there are a total of 2 + 7 + 3 parts = 12 parts . . and each part individually is as follows:

pineapple = 2/12
orange = 7/12
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Sally has 12 parts = 600 ml of drink
. . pineapple = 2/12*600ml = 100 ml pineapple
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We know Karen has 600 ml of lime juice and if that is 3/12 of the total, then 600*12/3 = the total drink = 2400 ml of drink

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Thus . . . (for Karen) . . .
A = 2400 ml of drink
B = 400 ml of orange juice
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