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hjlf
3 years ago
11

The total scores on the Medical College Admission Test (MCAT) follow a Normal distribution with mean 25.2 and standard deviation

6.9. (a) What are the median and the first and third quartiles of the MCAT scores? (Enter your median to one decimal place. Round your quartiles to the nearest whole number.)
(a) What proportion of students taking the MCAT had a score over 31?


(b) What proportion had a score between 21 and 24?
Mathematics
1 answer:
erica [24]3 years ago
8 0
Honey God is good god bless u with that hw
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Alexis washes 10 1/2 windows in 3/4 hours. At this rate, how many windows can she wash in one hour?
Zepler [3.9K]

Alexis can wash a total of 14 windows in 1 hour

<h3><u>Solution:</u></h3>

Given that Alexis washes 10\frac{1}{2} windows in \frac{3}{4} hours

<u><em>To find: </em></u>number of windows washed in one hour

To simplify the calculations we will convert the given mixed fraction to improper fraction

\begin{array}{l}{=10 \frac{1}{2}} \\\\ {=\frac{2 \times 10+1}{2}} \\\\ {=\frac{21}{2}=10.5}\end{array}

Hence, to wash 10.5 windows, Alexis takes 0.75 hours

Let "n" be the number of windows washed in 1 hour

10.5 windows ⇒ 0.75 hours

"n" windows ⇒ 1 hour

By cross-multiplication we get,

n \times 0.75 = 10.5 \times 1

n = \frac{10.5}{0.75} \\\\n = 14

Thus Alexis can wash 14 windows in one hour

4 0
3 years ago
123, 472 to two decimal places​
inna [77]

Answer:

123.00 and 472.00

Step-by-step explanation:

can't really do much except add 0's since those numbers are whole numbers

3 0
3 years ago
what is the center of a circle whose equation is x2 + y2 – 12x – 2y + 12 = 0? o (-12,-2) o (-6, -1) o (6, 1) (12, 2)
Leno4ka [110]

Answer:

(6,1)

Step-by-step explanation:

1.) group the x and y terms (and move the constant to the other side)

x²-12x+y²-2y= -12

divide the coeficcents for the terms with just 1 or 1 x variable by 2 and then square it (and add that to both sides)

x²-12x+36+y²-2y+1= -12+36+1

factor

(x-6)²+(y-1)²= 25

the center is therefore (6,1)

7 0
3 years ago
Please translate each algebraic expression to English phrase
ludmilkaskok [199]

1. x - 8

2. 13 + 2y

3. 4 ( x+ 5)

4. 7x

5. m + 6
5 0
2 years ago
Read 2 more answers
One number is four times another number and their difference is 24. find the number.
Flura [38]
8 and 32.

8 times 4 = 32
32 - 8 = 24

4x - x = 24.
 ^    ^
1     2
3 0
3 years ago
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