1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jek_recluse [69]
3 years ago
13

Michaela spent 5/6 of an hour reading on each of 3 days this week. She spent 3/4 of an hour on each of 2 days this week doing sc

ience. She spent 1/2 of an hour on each of 4 days this week doing math. Milana said she spent 5 1/2 hours doing reading, math, and science this week. Michaela said that she spent 2 1/2 hours doing reading, math, and science this week. Who is correct? What mistake did someone make? Explain your thinking and draw models to support your answer.
Mathematics
1 answer:
Kay [80]3 years ago
7 0
5/6 of an hour is 50 min. So 50 times 3 equals 150 min for reading. 3/4 of an hour is 45 min. 45 times 2 equals 90 min for science. And 1/2 of an hour is 30 min. So 30 times 4 equals 120 mins for math. Add 150,90, and 120 min all together and you get 360 mins total. Divide 360 by 60, and you get 6 hours total that Michaela spent on reading, math, and science. Not 2 1/2.
You might be interested in
Find the complex zeros of the following polynomial function.
GalinKa [24]

Answer:

x=\frac{-1\pm\sqrt{3}i}{2}

Step-by-step explanation:

f(x)=x^3-1

0=x^3-1

0=(x^2+2x+1)(x-1)

x-1=0

x=1 <-- Real Solution

x^2+x+1=0

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

x=\frac{-2\pm\sqrt{2^2-4(1)(1)}}{2(1)}

x=\frac{-1\pm\sqrt{1^2-4(1)(1)}}{2(1)}

x=\frac{-1\pm\sqrt{1-4}}{2}

x=\frac{-1\pm\sqrt{-3}}{2}

x=\frac{-1\pm\sqrt{3}i}{2} <-- Complex Solutions

6 0
3 years ago
Which distance measures 7 units?
Alina [70]

Answer:

the distance between points M and P

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Five students visiting the student health center for a free dental examination during National Dental Hygiene Month were asked h
Andrews [41]

Answer:

[0.9 months, 32.69 months]

Step-by-step explanation:

The mean is

\bf \bar x=\frac{5+17+12+21+29}{5}=16.8

The standard deviation is

\bf s=\sqrt{\frac{(5-16.8)^2+(17-16.8)^2+(12-16.8)^2+(21-16.8)^2+(29-16.8)^2}{5}}=8.1092

Now, we have to find two values a and b such that the area under the Normal curve with mean 16.8 and standard deviation 8.1092 between a and b equals <em>95% = 0.95 </em>

Using a spreadsheet we find these values are

a = 0.906

b = 32.694

<h3>(See picture) </h3>

and our 95% confidence interval for the mean number of months elapsed since the last visit to a dentist for the population of students participating in the program rounded to two decimal places is

[0.9 months, 32.69 months]

4 0
3 years ago
The diameter of a ball is 8 in.
sergejj [24]

Answer:

267.95

Step-by-step explanation:


6 0
3 years ago
Read 2 more answers
A persons car traveled 60 miles in 45 minutes, how many miles per hour was it traveling?
Tems11 [23]
To reach 60 miles in 45 minutes you’ll have to drive 80mph
8 0
2 years ago
Other questions:
  • Please help anyone......
    7·1 answer
  • HELPPPPPP PLEASEEE !
    10·1 answer
  • Which of these groups is in ascending order?
    7·1 answer
  • What would the simple interest rate be if you earned $136 on a $1700 investment in one year?
    15·1 answer
  • How many times larger is 3 x 10 to the power of negative 5 end exponent than 6 x 10 to the power of negative 12 end exponent
    14·1 answer
  • What is 1/2 of 7/8? In fraction firm
    12·1 answer
  • What is 6 1/4 written as a decimal?
    8·1 answer
  • Help....................​
    13·1 answer
  • The distance between Manchester and Leicester is 105 miles c) what is the distance in km
    11·1 answer
  • Match the polynomial on the left with the appriately factored expression on the right x^2-3x-18
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!