Factor the expression 21w^7 + 35w^3 show work.. i got this wrong on a test need to know how to do it not just answer

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Svetlana's hair is 4 4 centimeters ( cm cm) long. her hair grows 1 . 5 cm 1.5cm per month. svetlana wants her hair to be less than 1 6 cm 16cm long. write an inequality to determine the number of months, m m, svetlana can allow her hair to grow so that it is less than 1 6 cm 16cm long.

If you could answer these your a life saver