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Cloud [144]
3 years ago
12

In a lab, a substance was heated by 16°C over a period of 4 hours at a constant rate. What was the change in temperature each ho

ur?
Mathematics
2 answers:
Arada [10]3 years ago
5 0

Answer:

4° C per hour

Step-by-step explanation:

16/4 will give us the temperature change every hour

ollegr [7]3 years ago
5 0
The temperature change was 4 C per hour
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A number is increased by 54. The sumos then divided by 9. The result is 21. Write an equation to represent the discription, use
hram777 [196]

Answer:

  (n+54)/9 = 21

Step-by-step explanation:

A number: n

Is increased by 54: n+54

The sum is divided by 9: (n +54)/9

and the result is 21:

  (n +54)/9 = 21

6 0
3 years ago
4) Arnold ate breakfast at a restaurant. His total came to $76.75. There is an 8% sales tax and 15% tip. What is Arnold's total
lisov135 [29]

Answer:

The total cost is $95.32.

Step-by-step explanation:

Given:

Total came to $76.75. There is an 8% sales tax and 15% tip.

Now, to find the total cost.

<em>8% sales tax is there so we calculate the amount after adding sales tax:</em>

$76.75 + 8% of $76.75

76.75+\frac{8}{100}\times 76.75

76.75+0.08\times 76.75

76.75+6.14

82.89

The cost after sales tax is $82.89.

Now, <em>the cost after 15% tip:</em>

$82.89 + 15% of $82.89

82.89+\frac{15}{100}\times 82.89

82.89+0.15\times 82.89

82.89+12.43

95.32

The cost after the tip is $95.32.

Therefore, the total cost is $95.32.

8 0
3 years ago
The sandbox at a local playground is shaped like a square. The length of one side of the sandbox is 8 feet. What is the area of
Elan Coil [88]

Answer:

8^2 ft^2

Step-by-step explanation:

8^2= 64, and to find area it lengthxwidth.

so 8x8=64

4 0
3 years ago
Read 2 more answers
Zamba has found a little black dress on sale for 50% off the original price of $239.99. She also has a coupon offering free ship
Sedbober [7]
$139.23 you take the 239+34.70 then take 10% off
6 0
3 years ago
................................................................................................................................
kramer

Answer:

It is d.

Step-by-step explanation:

May i have brainliest

8 0
3 years ago
Read 2 more answers
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