Find the least positive angle measurement that is coterminal with -20
a) 342
b) 340
c) 345
d) 350

The Option B). 340 is correct.

Step-by-step explanation:

Co-terminal angles : The angles who has same terminal or initial sides are known as terminal angles.

So, in order to find measure of co-terminal angles we add or subtract the complete angle of 360° formed at a point.

Now, the measure of an angle is given to be 20°

To find : Least positive Co-terminal angle of 20°

Since, we need to find least positive co-terminal angle we subtract 20° from 360°

Required co-terminal angle measure = 360° - 20°

Hence, measure of co-terminal angle of 20° = 340°

Therefore, Option B). 340 is correct.

4.0 ft

step-by-step explanation:

4.0 ft

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)