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
kodGreya [7K]
3 years ago
11

The perimeter of a rectangle is 90 centimeters. The length is 27 centimeters.

Mathematics
1 answer:
Sveta_85 [38]3 years ago
7 0

Answer: 18 cm

Step-by-step explanation:

the perimeter of a rectangle = 2 equal sides + 2 different equal sides

27cm + 27cm = 54cm

90cm - 54cm = 36cm

36cm/2 = 18 cm

27+27+18+18= 90

You might be interested in
SAT scores: The College Board reports that in 2009, the mean score on the math SAT was 582 and the population standard deviation
Andrews [41]

Answer:

we can conclude that there is no significant evidence to conclude that the mean score in 2010 differs from the mean score in 2009.

Step-by-step explanation:

H0 : μ = 582

H1 : μ < 582

Test statistic :

T = (xbar - μ) ÷ σ/√n

Xbar = 515 ; n = 20 ; σ = 120

T = (515 - 582) ÷ 120/√20

T = -67 / 26.832815

T = 2.50

Pvalue at t score = 2.50 ; df = 19 is 0.0187

At α = 0.0187

Pvalue > α ; Hence, we fail to reject the Null

Hence, we can conclude that there is no significant evidence to conclude that the mean score in 2010 differs from the mean score in 2009.

7 0
3 years ago
A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa
Naya [18.7K]
The 90% confidence interval is (70 - 4, 70 + 4). The margin of error is 4%.
4 0
3 years ago
What is the volume of a right circular cone if the circumference of the base is 125.6 ft and the height is 75 ft.?
Eddi Din [679]

Answer:

Hence the volume of the cone is 31384.52 cubic feet

Step-by-step explanation:

We must first need to understand how the volume of a cone is calculated.

It is simply calculated by multiplying the base area of the cone by the height, and dividing the result by 3.

This is :

Volume of cone = \frac{\pi r^2 h}{3}

we are not given the base area of the cone. However, we are given the circumference from which we can get the radius of the base.

Circumference =

2 \pi r=125.6ft\\r =125.6/2 \pi=19.99ft

hence the volume of the cone is

\frac{\pi (19.99)^2 75}{3}=31384.52ft^{3}

Hence the volume of the cone is 31384.52 cubic feet

3 0
3 years ago
The temperature in Berlin is -7 °C and the temperature in Istanbul is -3 °C.
Orlov [11]

Answer:

(a) is 4*C and (B) is 16*C

5 0
2 years ago
-5 times what = 25....
Korolek [52]
-5 times -5= 25
because the negative times negative=positive
8 0
3 years ago
Read 2 more answers
Other questions:
  • 6(x-2)=5x+3x+8 solve for x.
    7·2 answers
  • Check my answers? 15 points to whomever answers.
    8·1 answer
  • If i were to rotate PQRS 90° counterclockwise, what would be the new coordinates?
    12·1 answer
  • (08.03) Consider the following pair of equations:
    11·1 answer
  • The function intersects its midline at(pi, -4)and has a minimum point at (pi/4, -5.5) what is the formula for f(x)?
    8·1 answer
  • A shirt is priced at $24.95. If you have a coupon for 30% off, how much does the shirt cost after the coupon is applied?
    13·2 answers
  • I need this answer ASAP
    14·2 answers
  • had four times as many videos as . After Jack gave 60 to his cousin and Jill lost 6, they both had the same number of videos. Ho
    8·1 answer
  • A student finished a 30 question test in 75 minutes. Which rate best represents the relationship between the number of minutes s
    10·1 answer
  • The sum of three consecutive even integers is 72. Let x represent the first integer, x + 2 represent the second integer, and x +
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!