Assume that a randomly selected subject is given a bone density test those test scores are normally distributed with a mean of 0 and a standard deviation of 1 draw a graph and find the probability of a bone density score between -1.75 and 1.75

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b