The volume of this prism is 378

What is the length of x?

Given:

Base area of a prism = 27 cm²

Height of the prism = x cm

Volume of the prism = 378 cm³

To find:

The length of x.

Solution:

We know that,

where, B is base area and h is height of the prism.

Putting the given values, we get

Divide both sides by 27.

Therefore, the length of x is 14 cm.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm