The function f is continuous son the interval [2, 10] with some of its values given in the table below. use a right riemann sum approximation with 4 rectangles to approximate the integral from 2 to 10 of f of x dx.

x 2 4 7 9 10
f(x) 0 3 8 15 18

answer choices:
30.5
78.0
40.0
59.0

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left