The shape is a parallelogram. CD=10cm, BD=7cm. Find it's area.​

70

Step-by-step explanation:

here,

area of parallelogram =base ×height

so,

base is given 10 cm and height is given 7 cm

Now

base ×heights

10×7

70

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:

here is your mark brainliest