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Sergeu [11.5K]
3 years ago
5

This is the last thing i need..

Mathematics
2 answers:
madreJ [45]3 years ago
4 0
The answer is A. 4.5
Whitepunk [10]3 years ago
3 0

Answer:

whats the question

Step-by-step explanation:

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Convert “6750.” into scientific notation
Sophie [7]

Answer:

6.75 × 10^3

Step-by-step explanation:

Move the decimal 3 times to the left so that the resulting number, m = 6.75, is greater than or equal to 1 but less than 10

Since we moved the decimal to the left the exponent n is positive

n = 3

Write in the scientific notation form, m × 10^n

6.75 × 10^3

7 0
2 years ago
Peter takes16 minutes longer to mow the lawn by himself than Charles . Together they can mow the lawn in 18 minutes. How long wi
lapo4ka [179]

Answer:

  about 29.7 minutes

Step-by-step explanation:

If it take c minutes for Charles to mow the lawn by himself, it takes c+16 minutes for Peter. The two of them working together can mow in one minute this fraction of the entire lawn:

  1/c + 1/(c+16) = 1/18

Multiplying by 18c(c+16), we get ...

  18(c +16) + 18(c) = c(c+16)/18

  36c +288 = c^2 +16c

  c^2 -20c = 288 . . . . . subtract 36c

  c^2 -20c +100 = 388 . . . . . add (20/2)^2 = 100 to complete the square

  (c -10)^2 = 388

  c = 10 +√388 ≈ 29.6977 . . . . . take the positive square root

It takes Charles about 29.7 minutes to mow the lawn by himself.

7 0
2 years ago
Veronica has been saving dines and quarters. she has 94 coins in all and the total value is $19.30. How many dimes and quarters
Murrr4er [49]
D+q=94
.10d+.25q=19.30

7 0
2 years ago
Make A the subject of the formula
iogann1982 [59]

Answer:

A= 3r^2

Step-by-step explanation:

7 0
2 years ago
TWENTY POINTS.
earnstyle [38]

Answer: 54 feet or 648 inches.

Step-by-step explanation:

1. You know that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. Therefore, you can calculate the width of the full-sized house that it's modeled after, as following:

width=\frac{108in*1/2ft}{1in}\\width=54ft

2. Then, the width in feet is: 54 feet.

3. And the width in inches is:

(Keeping on mind that 1 feet=12 inches)

\frac{54ft*12in}{1ft}=648in

4 0
3 years ago
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