At which approximate light intensity does the oxygen production begin to level off? a. 40%
b. 60%
C. 80%
d. 100%
Please select the best answer from the choices provided
A
B

D

a. 40%

Explanation:

up to 40% increasing the light intensity increases the oxygen production. Beyond 40% there is no effect.

I hope this helps :)

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

chordata is the answer