If your giving a customer a 10% off discount on a sale of 10.92,what would the discount be?

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?