7
jean is doing an experiment to find out whether mold grows faster on certain types of bread. she has eight different types of bread. she places them out on the same counter. every day, jean examines each loaf of bread for signs of mold growth. she then records her observations.

which variable is jean changing in the experiment?
a.
the type of bread
b.
the type of mold
c.
the amount of time each loaf is left out
d.
the amount of light each loaf receives

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.