ElectricPavlov

"hi"  back at ya....

This is generally the form of a financial equation where 't' is the number of time periods where the periodic  interest, i , (in this case -.25) is applied

5300/22500 = .75^t

Take log of both sides

-.627066 =  t log .75

t=5.025 time periods (whatever they are....weeks, months years etc)

A very stupid question that isn't funny and is asked repeatedly on this forum......go away.

h/9  <=  1/4        Multiply both sides of the equation by 9 to get

h <= 9/4

Multiplication and division can take place in any order and take precedence over addition and subtraction. 

60 or 120 degrees

=  sinx / cosx

x = slow train speed (mph)

x+20 = faster train

Slow train travels  1.25 hours for a distance of   1.25 x

Faster train leaves an hour later and travels only .25 hour so distance is  .25(x+20)

The tow distances ae equal, we are told

.25(x+20) = 1.25x

.25x + 5 = 1.25x

5 mph = x = slower train        FYI: Faster train is 20 + x =  20 + 5 = 25  mph 

37 * 19 = 703    use the calculator......

Use the   'e' button        then the  x^y button underneath the 'e' button   then    2.95    then 

the  + - button ....then  =