What is the first step when rewriting y=-4x^2+2x-7 in the form y=a(x-h)^2 +k

Volume of cylinder with a radius of 8cm and height of 25 cm

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.