We can solve this question in two ways. The first method is to divide 6.71 x 10 ^ 8 by 60 and get the speed for one minute and then multiply the remaining answer by 90 to get for 90 complete minutes.
But what i will do is that i will divide it by 2 which will give us the time for 30 minutes and then multiply it by 3 so we get the answer for 90 minutes. So the answer is 4.26x 10^ 8 multiplied by 3.
LCD = 1
Hope this helps !
Have a great day!
Answer:
D, -8
Step-by-step explanation:
31-7 because all you have to do is add the question
Answer:
The common difference of the progression is 3.
Step-by-step explanation:
Given:
First term of the AP = (a) = -8
Ratio of 7th and 9th term = 5:8
So,
General term of an AP, Tn= a+(n-1)d
Where 'd' is the common difference.
equation...(i)
equation...(ii)
According to the question.
⇒
...cross-multiplying the terms.
⇒ ![8(-8+6d)=5(-8+8d)](https://tex.z-dn.net/?f=8%28-8%2B6d%29%3D5%28-8%2B8d%29)
⇒
⇒
...subtracting 40d and adding 64 both sides.
⇒ ![8d=24](https://tex.z-dn.net/?f=8d%3D24)
⇒
...dividing both sides with 3.
So the common difference of the progression is 'd' = 3.