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stiv31 [10]
3 years ago
9

Horatio drew a circle with a radius of 6x cm. Kelli drew a circle with a radius of 18y cm. What is the scale factor between thes

e two circles? (this is a quiz question, you will recieve a medal for best answer)
A. x/3y
B. 2x/3y
C. 1/3
D. 2/3
Mathematics
2 answers:
jasenka [17]3 years ago
5 0
I believe the answer Is A.x/3y.
crimeas [40]3 years ago
5 0
The scale factor of these two circles is the ratio of their radii. This is shown below,
                               sf = r1 / r2   =   6x/18y
Simplifying the fraction by dividing both the numerator and the denominator by 6 gives an answer of x/3y. Thus, the answer is letter A. 
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Knowing that the final course grade is determined in the manner described above, Kyra can figure out what grade she needs to ear
ipn [44]

Answer: Kyra must earn at least 100% on the final exam.

Step-by-step explanation: Kyra's scores have been accumulating from Q1 to Q4 and then the mid term exam. Her scores are outlined as follows;

Q1 = 92, Q2 = 85, Q3 = 88, Q4 = 84, mid-term = 89.

Observe carefully that the data set (number of observed data) is 5.

What she needs now is a final average score of at least 90% after her final exam. She can use this to determine what she needs to score in her final exam. In other words, now that she has a average score, all she needs is a total of all her scores up till her final exam. Note that after writing her final exam, the data set would be six and no longer five.

Before writing her final exam, Kyra's average score was calculated as;

Average = (92 + 85 + 88 + 84 + 89)/5

However after she must have written her final exam, her average would be calculated as;

Average = (92 + 85 + 88 + 84 + 89 + x)/6

Where average is given as 90 and x is the final exam score, you now have

90 = (438 +x)/6

90*6 = 438 + x

540 = 438 + x

Subtract 438 from both sides of the equation

102 = x

Therefore from the results shown, Kyra must score up to 102% in her final exam. However, knowing that she cannot obtain a score higher than 100%, we can conclude that she must score nothing less than 100% (a hundred percent) in her final exam.

7 0
3 years ago
Who’s right? And why?
Digiron [165]

Answer:

Oscar is. dividing the cost by the amount you will find that all answers equal 3.99

3 0
2 years ago
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harina [27]

Answer:

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Step-by-step explanation:

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The volume of a box 4in wide 2in high and 5in long is
Free_Kalibri [48]

Answer:

40 cubic inches

Step-by-step explanation:

The Formula for Volume: Length x Width x Height (L x W x H)

4 times 2 times 5 = 40

6 0
3 years ago
1 and 3/4 as an improper fraction
expeople1 [14]
7/4 you do this because, for example you can think of it like pizza and pizza slices. You have 1 pizza and 3/4 of a pizza, let’s say each slice is 1/4 of a pizza. How many slices do you have altogether? Seven. You can also think of 1 as 4/4, so the just add 3/4 + 4/4 (which is technically just 3+4) = 7/4
3 0
3 years ago
Read 2 more answers
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