Answer: the quotient is 4
0.00072 in scientific notation is 7.2x10^-4
Answer:
11,232,000 different plates
Step-by-step explanation:
Figure it out like this:
2letters × 3digits × 1letter
Nothing can repeat. There are 26 letters in the alphabet. If we use 1 of those letters, then there are only 25 letters left to choose from. That's why we start with 26 × 25.
Now for the digits, we have 10 choices for the first digit, then 9 choices for the second digit, then 8 choices for the third digit. That's why we follow the letters with 10 × 9 × 8.
For the last letter, we had 24 choices left, so the whole thing is found by multiplying:
26 × 25 × 24 × 10 × 9 × 8 × 24 = 11,232,000
Answer: it would take them 4.24 hours
Step-by-step explanation:
It takes Emily eight hours to paint her house. Her unit rate of working in terms of hours would be 1/8
Mike can paint the same area in nine hours. Mike's unit rate of working in terms of hours is 1/9
If both of them can work together,Then, the work would take lesser time because they would be working together at their own unit rates. This means that the rates are additive. Their combined rates would be 1/8 + 1/9
Let t be the time it takes them to finish the work together. This means that their unit rate of working together will be 1/t. Therefore,
1/8 + 1/9 = 1/t
17/72 = 1/t
17t = 72
t = 72/17
t = 4.24
