The mass of a carbon atom is 1.994 × 10-23 grams. the mass of a hydrogen atom is 1.67 × 10-24 grams. what is the difference of their masses?
a. 0.324 × 10-24 grams
b .1.827 × 10-23 grams
c .1.827 × 10-24 grams
d. 0.324 × 10-23 grams

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3