2 years ago

The circumference of a circle is 30cm. (a) Calculate the radius of the circle

Mathematics

1 answer:

tigry1 [53]2 years ago

6 0

Answer:

C=2πr

30cm=2πr

30cm/2π =2πr/2π

15πcm=r

You might be interested in

for a special concert by a popular band, the concert hall owner decided to charge $20 per ticket for the first "r" rows and $15

Alecsey [184]

R = 16 according to the problem, so the total amount of income will be:
$20*16 + $15*(40 - 16)
= $320 + <span>$15*(24)
= </span>$320 + <span>$360
= $680
that is the income, but the expenses are $275 so the total revenue is the subtraction of those two
total revenue = $680 - $275
= $405</span>

7 0

3 years ago

There are 70 students in the school band. 40% of them are sixth graders, 20% are seventh graders, and the rest are eighth grader

Anon25 [30]

Answer:

The number of students in the school band = 70

40% of students in the school band are sixth graders.

20% of students in the school band are seventh graders.

We have to find the number of band members that are sixth graders.

The number of sixth graders in school band are:

$40\% of 70$