Let T be the triangular region in the xy-plane with vertices (0,0),(m,0),(m, n), where m, n are positive constants. Use a double integral in polar coordinates to calculate the average value of the x-coordinate, taken over all points in T. You may assume the formula for the area of the triangle.

10

step-by-step explanation:

a

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168