1. rainbows are more beautiful after fall rainstorms than spring rainstorms.
this statement is a poor hypothesis because it is not?
a. a question
b. testable
c. observable
d. a comparison
2. when a biologist in a laboratory reports a new discovery based on experimental results, biologist in other laboratories should be able to
a. repeated the experiment with a different variable and obtain the same results
b. perform the same experiment and obtain different results
c. repeat the same experiment and obtain the same results
d. perform the same experiment under different experimental conditions and obtain the same results.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.