Which condition must be satisfied in order to use the arc length formula l = the integral from a to b of sqrt(1 + f'(x)^2) dx?

which one is it? tell me why you think it's the answer you chose.

(a) f(x) is continuous on [a, b]

(b) f'(x) is defined on [a, b]

(c) f'(x) is continuous on [a, b]

(d) f'(x) ≠ 0 on [a, b]

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Which of the following graphs could represent a cubic function?

Walgreens sells both kleenex and nyquil. in a random sample of 5000 purchases, it was found that 1200 contained kleenex and 540 contained nyquil. these are not independent because sick people are more likely to buy both and healthy people more likely to buy neither. in looking into that, it was found that 360 purchases contained both. a. make a two-way table to display this information. fill in the table with the missing entries, and be sure your table has row and column totals. b. if we randomly select a purchase that contained kleenex, what is the probability it also contained nyquil? c. what percent of all purchases didn’t contain either product?