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
Ira Lisetskai [31]
3 years ago
11

the times that gym members spend on a treadmill are normally distributed with a mean of 20 min and a standard deviation of 8 min

. there 240 who will use a treadmill today. about how many gym members are expected to spend 4 min and 36 min on a treadmill today?
Mathematics
1 answer:
Papessa [141]3 years ago
6 0
<span>Given:
xbar = 20 min
standard deviation = 8 min
total sample = 240

Required:
how many gym members are expected to spend 4 min and 36 min on a treadmill today

Solution:
sd</span>² = (∑(x - xbar)²) / N - 1

there are 42 gym members at 4 minutes and 200 gym members in 36 minutes.
You might be interested in
Two lighthouses flash their lights every 20 seconds and 30 seconds respectively. Given that they flash together at 8 p.m, when w
Free_Kalibri [48]
One minute later at 8:01pm. One lighthouse will flash 3 times (at 20, 40 and 60 seconds)...the other will flash twice (at 30 and 60 seconds). So they will both flash 60 seconds later, at 8:01
6 0
3 years ago
a plane flies 480 miles with a 15 mph tailwind and then back 480 miles with a 15 mph headwind. if the plane completes the trip i
Minchanka [31]
Since we know the x and y, you would divide 480 by 15 and 32 miles per hour. Then you would multiply 7.2 by 32 and get 230.4. Your trying to find with wind and against wind so just times that by two and get 460.8. I think
8 0
3 years ago
* Use order of operations to solve the following.
Bingel [31]
The answer is 100 if that 5 and 2 is separate
3 0
3 years ago
Read 2 more answers
Help Please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Kamila [148]

Answer:

x = 80°

Step-by-step explanation:

Angle on a straight line = 180°

(x + 40)° + (x - 20)° = 180°

x + 40° + x - 20° = 180°

2x + 20° = 180°

2x = 180° - 20°

2x = 160°

x = 160°/2

x = 80°

Check:

(x + 40)° + (x - 20)° = 180°

(80° + 40°) + (80° - 20°) = 180°

120° + 60° = 180°

180° = 180°

3 0
3 years ago
A serving size for pineapple-orange punch is 1/2 cup. Liam needs to make 72 servings of punch. He will use 8 pints of pineapple
Luden [163]
Since a serving is 1/2 cup and he needs 72 servings you can multiply 72 by 1/2 and find out that he needs to make 36 cups of punch. Two cups is a pint so he needs (36 / 2) 18 pints of juice. He already has the 8 pints of pineapple juice so 18 - 8 leaves 10 pints of orange juice.
8 0
3 years ago
Other questions:
  • What is the difference between rate and unit rate
    10·1 answer
  • A line passes through the point (–2, 7) and has a slope of –5. mc009-1.jpg What is the value of a if the point (a, 2) is also on
    12·2 answers
  • Joe spent $4.36 for gasoline in driving 68 miles. How much would he spend in driving 85 miles?
    11·1 answer
  • Select the true statement.<br> O<br> 2&lt;-3<br> O<br> -4.5<br> 0 43.5<br> -3&gt;-2
    5·1 answer
  • Please answer !!!!!!!! Will mark brainliest !!!!!!!!!!!
    15·2 answers
  • The perimeter of a triangle is 38 feet. One side of the triangle is 4 feet shorter than the second side. The third side is 6 fee
    15·1 answer
  • elena gives the following sequence of transformations to show that the two figures are similar by transforming ABCD into EFGD​
    8·2 answers
  • Please help (no links or I will report you)
    7·1 answer
  • Write an equation in standard form of the line that passes through (-4,-4) and has the slope -3/2
    6·1 answer
  • Nathan ended round one of a quiz with 200 points. In round
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!