What's is the rate of growth?

Giving ad is congruent to bc and angle bcd is congruent to angle adc prove d e is going to ce

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Nine more than four times a number is the same as one less than twice the number. find the number?