Answer:
g9gigiviboboob
Step-by-step explanation:
Answer:
option 4
Step-by-step explanation:
using the sine/ cosine ratios in the right triangle and the exact values
cos30° =
, sin30° =
, then
cos30° =
=
=
( cross- multiply )
2x = 20
×
= 20 × 3 = 60 ( divide both sides by 2 )
x = 30
and
sin30° =
=
=
( cross- multiply )
2y = 20
( divide both sides by 2 )
y = 10
K, so am assuming of th next day
from 7pm to 12 midnight is 5 hours
from 12 midnight so 3am is 3 hours
3+5=8
8 hours total
checked double the amoutn last time
he spent 16 hours last time?
36 pairs
because 2 spots = 1 pair
so 2x=72
and your answer will be 36 pairs
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➷ Calculate the number of hours:
24 x 3 = 72
72/13 = 5.5....
This is 5 whole half lives
You have to half the value 5 times
149/2 = 74.5
74.5/2 = 37.25
37.25/2 = 18.625
18.625/2 = 9.3125
9.3125/2 = 4.65625
The closest value is B. 3.21 so that should be the answer
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