Which compound inequality best describes the following?

if the temperature is at or above 84°f or below 75°f, then the samples are no longer usable.

a. 75 < x < 84

b. 75 _< x < 84

c. x < 75 or x _> 84

d. x _> 75 or x < 84

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee, f, for a single job is a function of the number, t, of hours it takes him to complete the job. write the function's formula.

Ingredient c: 1/4 cup for 2/3 serving or ingredient d: 1/3 cup for 3/4 serving which unit rate is smaller

Find y to the nearest hundreds place