Answer:
Step-by-step explanation:
100 = -16t^2 + 92t
16t^2-92t + 100 = 0
4t^2 - 23t + 25 = 0
t = [23 ±√(23^2-4(4)(25))]/[2(8)] ≈ 1.5, 4.3
The rocket has altitude of 100 ft at 1.5 sec and 4.3 sec.
:::::
0 = 16t^2-92t = t(16t-92)
t = 0, 5.75
Rocket is in the air for 5.75 seconds
The complete table will be:
![Monday - 100\\ Tuesday-65\\ Wednesday- 120\\ Thursday-150\\ Friday-90\\ Saturday- 0\\ Sunday-175](https://tex.z-dn.net/?f=Monday%20-%20100%5C%5C%20Tuesday-65%5C%5C%20Wednesday-%20120%5C%5C%20Thursday-150%5C%5C%20Friday-90%5C%5C%20Saturday-%200%5C%5C%20Sunday-175)
<u><em>Explanation</em></u>
Suppose, the number of sit-ups in Sunday is ![x](https://tex.z-dn.net/?f=x)
Mean is the simple average of some numbers. <u>For finding the mean number</u> of sit-ups per day, we need to <u>divide the 'total number of sit-ups' by the 'total number of days'</u>.
Here the total number of days is 7 and the total number of sit-ups for 7 days ![= 100+65+120+150+90+0+x= 525+x](https://tex.z-dn.net/?f=%3D%20100%2B65%2B120%2B150%2B90%2B0%2Bx%3D%20525%2Bx)
Given that, the mean number of sit-ups per day is 100. So, the equation will be...
![\frac{525+x}{7}=100\\ \\ 525+x=700\\ \\ x= 700-525=175](https://tex.z-dn.net/?f=%5Cfrac%7B525%2Bx%7D%7B7%7D%3D100%5C%5C%20%5C%5C%20525%2Bx%3D700%5C%5C%20%5C%5C%20x%3D%20700-525%3D175)
So, the number of sit-ups you have to do Sunday is 175.
Answer:
66.00
Step-by-step explanation:
Because round all of them and add the sums and you will get your answer