Let n represent the unknown number. 2.4% of what number is $1.08

$45

Step-by-step explanation:

Percent   =   part (is)                     %                =      1.08 is part of the total

100              whole (of)       % are out of 100            What number (variable)

2.4   =    1.08  

100         x                        1.08 * 100 ÷ 2.4 =  45

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m