For the function given below, find a formula for the Riemann sum obtained by dividing the interval [1,4] into n equal subintervals and using the right-hand endpoint for each ck. Then take a limit of this sum as n -> infinite to calculate the area under the curve over [1: 4]. f(x) = 4x

Answer this 30 points and brainliest!

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)