Find the value of b.

A. 57
B. 123
C. 50
D. 61.5

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

What is the missing step in this proof ?

If it 8 inch candle burns at 7/10 inch per hour and a 6 inch candle burns at 1/5 inch per hour after how many hours would both candles be the same height