Evaluate the given integral by changing to polar coordinates. sin(x2+y2)dA
iintegral. gif
R, whereRis the region in the first quadrant between the circles with center the origin and radii1and2

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

i got 86 for this

hope this !

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3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5