Originally Posted by

**jaycas21** amount of natural gas is proportional to oxygen consumed. 24.0 kg of Oxygen is

consumed in burning 15 kg of gas how much air 23% oxygen by wieght is consumed to burn 50 kg

a.80 kg

b 345 kg

c. 31.3 kg

d. 135 kg

4.Which of the following expressions would help estimate the value of:

Which of the following expressions would help estimate the value of:

[IMG]

a.36

b.29.25

c.t

d.43

5.During each microsecond the current in an electric circuit decreases by 9.3%. If the initial current is 2.45 mA, what will the current be after 22 microseconds?

0.286 mA

0.496 mA

0.121 mA

1.24 mA

7.The sales S of a product as a function of the time t (in weeks) is given by S = [2300 (5t + 1)]/(2t + 5). Find the instantaneous rate of change of S with respect to t for t = 9 weeks.

125

51

900

100