Mathematics: Aswimming pool is open for 7 1/2 hours a day. the pool kepps one lifeguard at a time and each lifeguard shift is 1 1/2 hous long. how many shifts are ther per day?

Aswimming pool is open for 7 1/2 hours a day. the

lorreee

18.01.2020

292

Step-by-step explanation:

Given

There are 240 members in a labor union

The number increases by 5% each year

After 1 year it is

$\Rightarrow 240+5\%\times 240\\\Rightarrow 240(1+0.05)$

After 2 years

$\Rightarrow 240(1+0.05)+5\%\times 240(1+0.05)\\\Rightarrow 240(1+0.05)(1+0.05)=240(1+0.05)^2$

Similarly, after 4 years

$\Rightarrow 240(1+0.05)^4\\\Rightarrow 291.72\approx 292$

0,0(0 оценок)