3 years ago

Find the total surface area of a sphere radius being 7cm

Mathematics

1 answer:

Lilit [14]3 years ago

6 0

Answer:

A≈615.75m²

Step-by-step explanation:

Solution

A=4πr2=4·π·72≈615.75216m²

Hope this helped!!!

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Which square root is a rational number ? Square root 50, square root 70, square root 81, square root 96

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Answer:

square root of 81

Step-by-step explanation:

$\sqrt{81} = 9$

so 9 is rational number.

the rest are irrational number

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4 years ago

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Suppose that there are 25 students in a class, each either a freshman, a sophomore, or a junior. How many students must be in th

Yakvenalex [24]

Answer:

at least 9 students in each cohort.

Step-by-step explanation:

Given that :

In a class, there are 25 students and each of them is either a sophomore, a freshman or a junior. We have to determine the number students in the same cohort.

Let us suppose there are equal number of students in each of the cohort.

Now let us assume that the number of the students in each cohort be 8, i.e. each as a freshman, a junior or a sophomore. Therefore, the total number in the all the cohorts will be 24 students only.

Thus, we can say that there are at least $9$ freshman, at least $9$ sophomore or at least $9$ junior in each of the cohort.