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aleksandr82 [10.1K]
3 years ago
15

A camera costs $400 normally, but there is a sale of 25% off. There is also 8% sales tax. What is the total cost of the camera.

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
7 0

Answer:

$324

Step-by-step explanation:

Two ways to look at it:

Change 25 % to a decimal

$400 x .25= $100 is the discount

$400- $100= $300

Sales Tax: change 8% to a decimal

300 x .08= $24

Total cost is $324

or you can say you are paying 75% for the camera since it is discounted 25%

So change 75% to .75

$400 x .75=$300

Sales Tax: change 8% to a decimal

300 x .08= $24

Total cost is $324

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Can you please help me with A and B
svetoff [14.1K]
I read:
Farm Maid Yogurt : 6 g of fat in 13 cups
Dairy Delight Yogurt: 5 g of fat in 11 cups.

(This is what I read, which does not represent realistic numbers, likely decimals are missing).

(a) Farm Maid Yogurt
6 g/13 cups = 10 g/x cups
Cross multiply: 6x = 130 => x=130/6=21.67 cups.

(b)
Farm maid : 6 g/13 cups, 6/13 in 13/13 cups => 0.4615 g/cup
Dairy Delight : 5 g / 11 cups, 5/11 in 11/11 cups => 0.4545 g/cup
=> Dairy Delight Yogurt has slightly less fat.

(c) 9 cups of Dairy Delight
5 g / 11 cups = x g / 9 cups
Cross multiply
11x=5*9 g => x=5*9/11 g = 4.09 g

(d) 3 cups of Dairy Delight & 5 cups of Farm Maid.
5 g/ 11 cups = x g / 3 cups 
Cross multiply
x=5*3/11 = 1.3636 g

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Cross multiply
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Total fat consumed = 1.3636+2.3077 g = 3.6713 = 3.671 g (to the nearest thousandth gram).


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