Joe went to the hobby shop and bought 2 model sports cars at $8.95 each and some paints. if he spent a total of 23.65, what was the cost of the paints? show work, and problem

Cost of paint = 5.75 $

Explanation:

Joe went to the hobby shop and bought 2 model sports cars at $8.95 each.

Number of models of sports car bought by Joe = 2

Price of each model sports car = $8.95

Total price of 2 model sports cars = 8.95 x 2 = 17.90 $

Total money he spent = 23.65 $

Cost of paint = Total money he spent - Total price of 2 model sports cars

                     = 23.65 - 17.90 = 5.75 $

Cost of paint = 5.75 $

Cost of the paints is $5.75 only.

Step-by-step explanation:

Since we have given that

Cost of each model sports cars = $8.95

And he bought two model sports cars.

Let cost of some paint  be x

Since we know that

Total money he spent = $ 23.65

Now,

According to question,

So, Cost of the paints is $5.75 only.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)