Please help me in math. Write an equation of the parabola shown.

If a || b and e || f , what if the value of y ?

Is there an x intercept in the equation 60*1.15^x

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq less than 132. the probability that a randomly selected adult has an iq less than 132 is?