The answer to the question is the second story problem
4 hours because when you set it up as an equation u get 40+60x=280 and it equals 4.
7.8 times 10^5
Step 1
To find a, take the number and move a decimal place to the right one position.
Original Number: 780,000
New Number: 7.80000
Step 2
Now, to find b, count how many places to the right of the decimal.
New Number: 7 . 8 0 0 0 0
Decimal Count: 1 2 3 4 5
There are 5 places to the right of the decimal place.
Step 3
Building upon what we know above, we can now reconstruct the number into scientific notation.
Remember, the notation is: a x 10b
a = 7.8 (Please notice any zeroes on the end have been removed)
b = 5
Now the whole thing:
7.8 x 10^5
Step 4
Check your work:
10^5 = 100,000 x 7.8 = 780,000
Cant be factored because it dosent have GFC
Answer:
D) 2852$
Step-by-step explanation:
basically you just multiply what the dude bought by how much money he spent, so
18 saws * 16$ = 1224 $
22 drills * 74$ = 1628$
then you add that together
1224 + 1628 = 2852$