Briana buys a ring marked $49.99. She receives a 20% discount. Which equation can be used to find the sale price of the ring? A. s = 49.99(0.20)
C. s = 49.99(1.80)
B. s = 49.99(0.80)
D. s = 49.99(1.20)

Np4=12np2 with clear explanation.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?