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3 years ago

Help me with 9, 10, 11, 12, 13 & 14 please!!

Mathematics

2 answers:

Mrac [35]3 years ago

7 0

9 cars

13.25$

22.7 miles

It weighs .01 kilograms and 1000 milligrams

4 classes

29,889 Ft 9963 yds

vagabundo [1.1K]3 years ago

5 0

9) 42/5= 8.4 but you can't have part of a car so round up to get 9 cars
10) 39.75/3= $13.25 per pair
11) 500/22=22.72 repeating, I would say an average of 23 mile per gallon
12) Kilograms- 0.01 and milligrams- 10,000
13) 112/35= 3.2 or 4
14)162 times 210= 34020 and 51 times 81= 4131
34,020-4,121= 29,889 ft and 3,321 yds

I really hope that I helped you!!!

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A cooler has a temperature of 32 degrees Fahrenheit. A bottled drink is placed in the cooler with an initial temperature of

FinnZ [79.3K]

Answer:

$k \approx 0.44$

Step-by-step explanation:

Given function:

$f(t) = (ce)^{-kt}+32$

As per question statement:

Initial temperature of bottle is 70 $^\circ F$ .

i.e. when time = 0 minutes, f(t) = 70 $^\circ F$

$70 = ce^{-k\times 0}+32\\\Rightarrow 38 = ce^{0}\\\Rightarrow c = 38$

After t = 3, f(t) = 42 $^\circ F$

$42 = 38 \times e^{-k\times 3}+32\\\Rightarrow 42-32 = 38 \times e^{-3k} \\\Rightarrow 10 = 38 \times e^{-3k} \\\Rightarrow e^{3k} = \dfrac{38}{10}\\\Rightarrow e^{3k} = 3.8\\\\\text{Taking } log_e \text{both the sides:}\\\\\Rightarrow log_e {e^3k} = log_e {3.8}\\\Rightarrow 3k \times log_ee=log_e {3.8} (\because log_pq^r=r \times log_pq)\\\Rightarrow 3k \times 1=log_e {3.8}\\\Rightarrow 3k = 1.34\\\Rightarrow k = \dfrac{1.34}{3}\\\Rightarrow k \approx 0.44$

Hence, the value is:

$k \approx 0.44$

8 0

3 years ago

Please help. Will give brainliest and 100 points!!!!

zubka84 [21]

Answer:

$48cm^{2}$

Step-by-step explanation:

The explanation is pinned.

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2 years ago

sweaters that are regularly sell for 36 dollars and on sale for 30 percent off how much is the discount

Liula [17]

Answer:

Step-by-step explanation: 36-30%= 25.2

your answer should be 25.2

7 0

1 year ago

Twelve more than half of a number is equal to the number

tester [92]

Let's consider that number to be 'x'..
So, twice the number (2x) is 12 greater than than the half of the number.
So the equation will be like,
2x=12+x/2
Solving this further,
2x=(24+x)/2
=> 4x=24+x
=>4x-x=24
=>3x=24
=>x=8..
So the number is "8".

5 0

2 years ago

Q1:

oee [108]

Answer:

tyson had the better deal.

Step-by-step explanation:

hed had the better deal because 168 divided by 8 is 21 which is less than 24

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3 years ago