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zubka84 [21]
4 years ago
10

Marcus built a model car that is 4 inches wide. What scale was used to build the car if the actual width of the car is 80 feet

Mathematics
1 answer:
Dvinal [7]4 years ago
7 0
First change the feet to inches. 80*12=960 Then set up a proportion 960/4=x/1.
You should get 240.  I'm pretty sure this is right. :)
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Scott took 4 2/5 hours to clean the bathroom. He took 2 1/4 hours to clean the den. How much longer did it take Scott to clean t
Anit [1.1K]
Find the difference between the two times

= 4 2/5 - 2 1/4
convert each mixed number to an improper fraction

= 22/5 - 9/4
change to common denominator (20)

= 88/20 - 45/20
subtract numerators only

= 43/20
change back to mixed number

= 2 3/20


ANSWER: It took 2 3/20 hours longer to clean the bathroom.

Hope this helps! :)
7 0
3 years ago
PLEASE HELP FAST URGENT
lys-0071 [83]

Answer:

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Step-by-step explanation:

6 0
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Read 2 more answers
A certain culture of year increases by 50% every three hours. A scientist places 9 grams of yeast in a culture dish. Write the e
miskamm [114]

Answer: a) Explicit formula :f(x)=9(1.5)^{3x}

b) Recursive formula : f(x)=9(1.5)^{3x} and f(x+1)=f(x)\times 1.5^3

Step-by-step explanation:

Since we have given that

Number of grams of yeast in a culture dish initially = 9 grams

According to question, a certain culture of year increases by 50 % every three hours.

So, the explicit formula will be

f(x)=9(1+\frac{50}{100})^{3x}\\\\f(x)=9(1+0.5)^{3x}\\\\f(x)=9(1.5)^{3x}

And the recursive formula will be

f(x)=9(1.5)^{3x}\\\\f(x+1)=9(1.5)^{3(x+1)}\\\\f(x+1)=9(1.5)^{3x+3}\\\\f(x+1)=9(1.5)^{3x}.(1.5)^3\\\\f(x+1)=f(x)\times 1.5^3

Hence, a) Explicit formula : f(x)=9(1.5)^{3x}

b) Recursive formula :f(x)=9(1.5)^{3x} and  f(x+1)=f(x)\times 1.5^3

6 0
3 years ago
What is the slope of a line perpendicular to 12x + 4y = -20
Semenov [28]

Answer:

- 1/12

Step-by-step explanation:

4 0
4 years ago
Pls help 20 points if u answer
yarga [219]
I have absolutely no idea i hate math so much
3 0
3 years ago
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