2) In a laboratory, scientists are performing chemical
reactions. The amount of product formed by a
reaction can be determined by the equation P=
.25r, where P is the product and r is the amount
of reactants used. Find out the constant of
proportionality.

the answer is 24

step-by-step explanation:

47 - 90 = 43

43 - 180 = x

x = 137

$2416.6

step-by-step explanation:

per hour = $ 25

total work time = 35

commission = 15%

total she has to make = $ 4,500

let she sold x dollar products

so her commission will be 15 % of x

now

total = weekly basic pay + commission

4500= (25*35) + 15 % of x

4500=875 + * x

4500-875 =   * x

3625= * x

multiplying wwith 100 on both sides gives

36250 = 15 x

now

x =  

x= $2416.6