70% of a number is 98.

what is 90% of that same number?

a.
63

b.
68.6

c.
88.2

d.
126

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Can someone me and plz do the problem

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base