Plz answer will mark brainiest

6.34

Step-by-step explanation:

First we need to find the volume of the Triangular Prism

The Formula is V= 1/2ACH

H= 0.9 yd

C= 2.4 (shares the same as the base of the rectangular prism)

A= 1.5

The answer of the Triangular Prism is: 1.62

Now we have that value we can solve for the rectangular prism

V= LWH

V= (2.4) (1.3) (1.6)

The answer for the rectangular Prism is 4.72

Now take both values and add

4.72 + 1.62= 6.34

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: