Mrs. johnson spend $611 buying lunch for 78 students. if all lunches cost the same, about how much did she spend on each lunch

$35.96 to 2.d.p. or 36 to 2.s.f.

Step-by-step explanation:

We can show this by:

611 = 78x

x being the 78 students

To find 1x which is the price of one student, or one lunch, we can simply divide both sides by 78:

Or:

35.95 = 1x

So each lunch cost 35.96 to 2.d.p. or 36 to 2.s.f.

the answer i think is a)

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)