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
galben [10]
1 year ago
5

Answer both 2 and 3 please

Mathematics
1 answer:
QveST [7]1 year ago
4 0
<h3>Time units.</h3>

2.

1 day = 24h

1h = 60min

We have 4h 20min

4h + 20min = 4h+\dfrac{20}{60}h=4h+\dfrac{1}{3}h=4\dfrac{1}{3}h=\dfrac{13}{3}h

\dfrac{\frac{13}{3}}{24}=\dfrac{13}{3}\cdot\dfrac{1}{24}\\\\\huge\boxed{(D)\ \dfrac{13}{72}}

3.

6:51PM + 9min → 7:00PM

7:00PM + 27min → 7:27PM

9min + 27min = 36min

36min=\dfrac{36}{60}h=\dfrac{3}{5}h

\huge\boxed{(C)\ \dfrac{3}{5}}

You might be interested in
9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9
gladu [14]

Answer:  a) (176.76,172.24), b) 0.976.

Step-by-step explanation:

Since we have given that

Mean height  = 174.5 cm

Standard deviation = 6.9 cm

n = 50

we need to find the 98% confidence interval.

So, z = 2.326

(a) Construct a 98% confidence interval for the mean height of all college students.

x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

\dfrac{\sigma}{\sqrt{n}}\\\\=\dfrac{6.9}{\sqrt{50}}\\\\=0.976

Hence, a) (176.76,172.24), b) 0.976.

8 0
3 years ago
What is the common difference between the terms in the following sequence?
Sergeeva-Olga [200]

Answer:

  -6

Step-by-step explanation:

Take a couple of differences and see:

  11 -17 = -6

  5 -11 = -6

The common difference is -6.

8 0
3 years ago
A theater wants to build movable steps that they can use to go on and off the stage. They want the steps to have enough space in
GrogVix [38]

Answer:

fdwef

Step-by-step explanation:

4 0
3 years ago
Round 1.49882 nearest to the nearest given place thousandths
I am Lyosha [343]
Okie doke. So, we are rounding this number to the nearest thousandths place, which is three digits behind the decimal. The rules for rounding are if the number is 5 or more in the digit behind it, the number goes up. If it is 4 or less, the number goes back. In other words, we depend on the digit right of the digit we are rounding to in order to see what we do. The number we are rounding is 1.49882. The 8 is in the thousandths place and the 8 is to the right of that, which is the ten thousandths place. Because 8 is greater than 5, the number rounds up. So the number rounded to the nearest thousandth is 1.500.
7 0
3 years ago
Can i have some help i spent a lot of points and it didn't work :((((
Ivahew [28]

Answers for A:

Factored form: (x-2)(x+4)

Zeros: x = 2, -4

Vertex: (-1, -9)

Answers for B:

Factored form: -(x+2)(x+7)

Zeros: x = -2, -7

Vertex: (-9/2, 25/4)

5 0
2 years ago
Other questions:
  • HELP WITH THIS MATH ANSWER QUESTIONS 1-4 URGENT HELP!!!!!!!!!
    15·1 answer
  • What is the lcm of two numbers if one number is a multiple of the other. Give an example
    14·1 answer
  • Which product is negative?
    15·1 answer
  • If a competitive bike rider averages 14 miles per hour for a 4 4 5 hour long race, how far will they travel during that time?
    9·2 answers
  • Under the onslaught of the College Algebra second period class, a pile of homework problems decreased exponentially. It decrease
    13·1 answer
  • a sleeping bag weighs 8 pounds. your backpack and sleeping bag together weigh 31 pounds. write an equation to determine whether
    10·1 answer
  • there are four times as many cows as horses on a farm. there are twice as many horses as pigs on the farm. which list shows the
    9·1 answer
  • 25. Write an expression to represent the area of the shaded region in simplest form.
    13·2 answers
  • A rectangle is divided into five triangles as shown. Noa h sa ys that the area of triangle A ls half the area of triangle B. Do
    7·2 answers
  • Define reductionism i m so boredd​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!