Can someone help me please

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

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

The acceleration of an object due to gravity is 32 feet per second squared.what is acceleration due to gravity in inches per second squared?