Can anyone help me fast?

b=8

Step-by-step explanation:

b²+15²=17²

b²+225=289

b²=289-225

b²=64

b= 8

I hope I helped you^_^

answer:

it will cost 480 dollars to refurbish the larger wood floor

step-by-step explanation:

as it's a ratio of 4 that costs 384 dollars, divide the price by the ratio

384 / 4 = 96 dollars

96 dollars per unit of the ratio

now to get the price to refurbish the larger wood floor, times the price by the units

96 * 5 = 480