Timothy has hired Cynthia and Dominic to cover the roof with shingles Dominic can install 180 shingles in the same time it takes Cynthia to install 150 shingles, which can be shown using the following
relationship where d and care the respective rates for Dominic and Cynthia
180
150
C
Also, Dominic can install 10 shingles more per hour than Cynthia
How many shingles can Cynthia install per hour?
a.) 60 shingles per hour
b.) 50 shingles per hour
c.) 40 shingles per hour
d.) 70 shingles per hour

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

idk lol xd

step-by-step explanation:

ez do it yourself lazy

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)