Work out the circumference of a circle with diameter 1.8 cm take pi to be 3.142

Me. drysdale earned 906.25 in interest in one year on money that he had deposited in his local bank if the bank paid an interest rate of 6.25% how much money did mr. drysdale deposit

Answer this question! 30 points and brainliest! only if you know the answer.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.