7.91 = 8 21.9 = 22
8 + 22 = 30
Step-by-step explanation:
Given that:-
So, we can concert 15 minutes to hours.
So,
60 minutes = 1 hour
1 minute = 1/60
15 minutes =
![\frac{15}{60} = 0.25 \: hrs](https://tex.z-dn.net/?f=%20%5Cfrac%7B15%7D%7B60%7D%20%20%3D%200.25%20%5C%3A%20hrs)
Okay, now we will apply first for 0.4 hours.
![0.25 \: hrs= 1 \: cell](https://tex.z-dn.net/?f=0.25%20%20%5C%3A%20hrs%3D%201%20%5C%3A%20cell%20)
![1 \: hr = \frac{1}{0.25}](https://tex.z-dn.net/?f=1%20%5C%3A%20hr%20%3D%20%20%5Cfrac%7B1%7D%7B0.25%7D%20)
![0.4 \: hrs = \frac{0.4}{0.25}](https://tex.z-dn.net/?f=0.4%20%5C%3A%20hrs%20%3D%20%20%5Cfrac%7B0.4%7D%7B0.25%7D%20)
![= 1.6 \: cells](https://tex.z-dn.net/?f=%20%3D%201.6%20%5C%3A%20cells)
![= 16 \times {10}^{ - 1} \: cells](https://tex.z-dn.net/?f=%20%3D%2016%20%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%201%7D%20%5C%3A%20cells)
Now, second one:-
![10 \: hrs = \frac{10}{0.25}](https://tex.z-dn.net/?f=10%20%5C%3A%20hrs%20%3D%20%20%5Cfrac%7B10%7D%7B0.25%7D%20)
![= 40 \: cells](https://tex.z-dn.net/?f=%20%3D%2040%20%5C%3A%20cells)
![= 0.4 \times {10}^{2} \: cells](https://tex.z-dn.net/?f=%20%3D%200.4%20%5Ctimes%20%20%7B10%7D%5E%7B2%7D%20%20%5C%3A%20cells)
Hope it helps :D
Answer:
b. They can both be 90 degree angles
c. Acute angles are by definition 90 degrees, and acute is less than but not equal to 90 degrees
d. should be always
e. should be never (explanation: they have to be adjacent to be supplementary, and vertical angles are never adjacent)
Step-by-step explanation:
The answer is B. l+w+d cannot be more than 61 inches so that sum must be less than 61 inches
Answer:
x = - 3.42443 or 6.42443
Step-by-step explanation: