Pls help with all questions i need them assap its ok if you just do 2 of them

If a • b*2 = 1.8 x 10*-7, and c•b/d = 7.2 x 10*-4, find the value of a•d*2/c*2

How many zeros does the function f(x)=4x3-x2+1 have

Asap its important using the information in the customer order, determine the length and width of the garden. enter the dimensions.length: feetwidth: feet