2. The mean weight of 800 college students is 56 kg and the standard deviation is 5 kg . Assuming that the weight is normally distributed, determine how many students weigh: a. Between 60 kg and 70 kg .

The equation \( t^{2}+5 t=14 \) has solutions \( t=a \) and \( t=b \), If \( a

ограничениях : \( \left\{\begin{array}{l}2 x_{1}+x_{2} \leq 8 \\ x_{1}+3 x_{2} \leq 7 \\ x_{1} \geq 0, x_{2} \geq 0\end{array}\right. \)

Consider: \( 5 x^{2}-k x+16=(x+2), Q(x)+10 \) where \( k \quad 190 \) constant and \( Q(x) 15 \) a polynamial in terms of \( x \). calculare \( k \).

A baseball player has a batting average of 0.265 . What is the probability that he has exactly 2 hits in his next 7 at bats? Round your answer to four decimal places. The probability the baseball player has exactly 2 hits in his next 7 bats is

The graph shows the possible combinations of the number of pounds of tangerines and lemons that could be purchased for \( \$ 18 \) at a certain store. If Melvin purchased lemons and 4 pounds of tangerines for a total of \( \$ 18 \), how many pounds of lemons did he purchase? A) 7 B). 10 C) 14 D) 16