Find the range of the function

The circumference of a circle is 60 pi cm3what is the radius of the circle

Find dy/dx using implicit differentiation ln(20+e^xy)=y

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is