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3 years ago

Please answer asap!!!

Mathematics

2 answers:

yuradex [85]3 years ago

8 0

Answer:

The answer is 972

Step-by-step explanation:

The equation of a sphere for volume is $V=\frac{4}{3} \pi r^{3}$ so, you insert the 9 as the radius for the r. so the equation would then be $V=\frac{4}{3} \pi 9^{3}$ then you solve it.

First you do $9^{3}$ = 729

Second take the equation and do order of operations $V=\frac{4}{3} \pi 729$

Next, do $\frac{4}{3} 729$ =972

Harlamova29_29 [7]3 years ago

3 0

Answer:

Step-by-step explanation:

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2 years ago

Which choice shows the following fractions with a common denominator? 3/4 and 5/6

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Step-by-step explanation:

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2 years ago

The 16th term of an A.P. is 40 and the sum of the first 5 terms is 5. Find the sum of the first 50 terms.

KiRa [710]

Answer:

The sum of first 50 terms is 3425.

Step-by-step explanation:

Let the first tem of A.P be 'a' and it's common difference be 'd'

Thus the 16th term of the A.P is given by

$T_n=a+(n-1)d\\\\40=a+15d..........(i)$

Now we know that the sum of first 'n' terms of the A.P is given by

$S_n=\frac{n}{2}[2a+(n-1)d]\\\\5=\frac{5}{2}[2a+4d]\\\\1=a+2d..........(ii)$

Solving equation 'i' and 'ii' simultaneously we get

$40=1-2d+15d\\\\13d=39\\\\\therefore d=3$

Thus $a=1-2\times 3=-5$

Thus the sum of first 50 terms euals

$S_{50}=\frac{50}{2}[2\times -5+(50-1)3]\\\\S_{50}=3425.$

7 0

3 years ago

Read 2 more answers