Year 1 2 3 4 5 6 7 8 9 Rate of Loss
What survival rate in the 10th year would make the average rate of loss over the 10-year period equal to 38.0%?
Definition: Survival rate is the opposite of rate of loss.
36.2% 29.0% 46.2% 37.5% 40.9% 40.0% 32.6% 40.5% 40.1%

wish i knew the word or no how to spell it i forgot how

Step-by-step explanation:

Ratio of Ed's share :  Dave's share  = 4 : 5

Step-by-step explanation:

Total amount shared =  £720

Let us assume that Dave receives =  £m

So, Chris's share = £90 + m

Also, Chris's share : Dave's Share = 7: 5

⇒

Here, solving for m , we get :  5(90 + m) = 7m

or,  450 + 5m = 7m

⇒ 2m = 450, ⇒ m = 225

So, Dave's Share =  m = £225

Chris's share = £90 + m = 225 + 90  = £ 315

Hence, Ed's share = Total - ( sum of Dave's and Chris's share)

= 720 -( 315 + 225) = £180

So, ratio of Ed's share :  Dave's share = £180 : £225

or, Ratio of Ed's share :  Dave's share  = 4: 5