Find positive numbers a and b so that the change of variables s=ax, t=by transforms the integral ∫∫rdxdy into ∫∫t∣∣∣∂(x, y)∂(s, t)∣∣∣dsdt for the region r, the rectangle 0≤x≤25, 0≤y≤75 and the region t, the square 0≤s, t≤1.

mark brainliest

step-by-step explanation:

2 tens + 6 ones

1 ten + 16 ones

0 tens + 26 ones

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

the height of the surface increases from the center out to the sides of the road

it is c!