6^3 * 7^3 = 42^3 is this correct

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?