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aleksandrvk [35]
3 years ago
9

David's optometrist sold him a bottle of eyeglass cleaner containing 30 ml of glasscleaning solution. assuming there are 20 drop

s per milliliter, and assuming proper cleaning requires 3 drops of glass cleaner on each side of each lens, what is the maximum number of times david can properly clean his glasses before he must buy a new bottle of eyeglas
Mathematics
1 answer:
Furkat [3]3 years ago
8 0
Each complete cleaning requires 6 drops of cleaner.  Let's convert that to ml:

6 drops     1 ml              3 ml cleaner
----------- * ------------- = ------------------- = 0.3 ml cleaner per cleaning
                 20 drops      10 cleanings

Recall that 1 bottle contains 30 ml cleaning fluid.

How many cleanings is one bottle of fluid good for?

1 bottle       0.3 ml
----------- = -----------   => x = 100 cleanings/bottle
      x            30 ml

 

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4. A mail carrier earns time and a half for any overtime hours. If her
nata0808 [166]

Answer:

$14.70

Step-by-step explanation:

If she get paid the time and a half you would first divide $9.80 by 2 which is $4.90. Now that you have the half price you add the original time to it. $9.80+$4.90= 14.70 so that’s the answer

4 0
1 year ago
When designing a building, you must be sure that the building can withstand hurricane force winds, which have a velocity of 73mi
Vesnalui [34]

Answer- 42646.50 pounds


Area of flat surface = Area of rectangle + area of triangle

                                = 12.9*25 + 1/2* 7.2* 25

                                 = 162.5 feet^2

Force exerted by wind =0 .004 * Area * velocity^2

                                      = 42646.50 pounds

5 0
3 years ago
Lexi had 3/4 of an apple pie. She gave 1/4 of what she had to her friend Julie. What fraction of the whole pie did Julie get?
Murljashka [212]

Answer:

<u>3/16 of the whole pie</u>

Step-by-step explanation:

Lexi had 3/4 of an apple pie. She gave 1/4 of it to Julie. That means what Julie receives is the product of the whole and the portion.

==========================================================

Solving :

Therefore, the equation is :

⇒ 3/4 × 1/4

⇒ <u>3/16 of the whole pie</u>

4 0
2 years ago
Suppose a squad patio has an area of 441 square feet. Use the formula for the area of a square to find the length of each side o
Sonja [21]
For a square: A=s^{2}

Solve for the length of a side by taking the square root of both sides:
\sqrt{A}=\sqrt{s^{2}}
\sqrt{A}=s

Now we can substitute known values:
s=\sqrt{A}
s=\sqrt{441ft^{2}}
s=21ft

8 0
3 years ago
I need help with solving for x. Then find the measure of the base angle. Please
Paraphin [41]

Answer:

x = 8 base angle = 81 degrees

Step-by-step explanation:

8 0
3 years ago
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