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rodikova [14]
3 years ago
11

Help! I cant solve this

Mathematics
2 answers:
KatRina [158]3 years ago
5 0
In one month, there are on average 30 days.

So if he talks 135 minutes per month, he talks on average 135/30 minutes per day

135/30 = 4.5

So on average he talks to his grandfather for 4 minutes and 30 seconds a day.
Anvisha [2.4K]3 years ago
3 0
The answer is 4.5, because you divide 135/30
You might be interested in
4x + 3.5x=180. How do you solve it
Grace [21]
4+3.5=7.5
7.5x =180
180/7.5
=24 (answer)
8 0
3 years ago
Alandra's rectangular cake pan is 33cm by 23 cm. She has enough cake batter to fill it to a depth of 3 cm. Instead, Alandra want
Alisiya [41]

Answer:

Alandra can fill 60 whole cones

Step-by-step explanation:

The volume of a rectangular prism is V = L × W × H, where

  • L is its length
  • W is its width
  • H is its height

The volume of the cone is V = \frac{1}{3} π r² h, where

  • r is the radius of its base
  • h is its height

∵ Alandra's rectangular cake pan is 33 cm by 23 cm

∴ L = 33 cm and W = 23 cm

∵ She has enough cake batter to fill it to a depth of 3 cm.

∴ H = 3 cm

→ Find the volume of the batter using the 1st rule above

∵ V = 33 × 23 × 3

∴ V = 2277 cm³

∵ Alandra wants to pour the batter into ice cream cones

∵ She plans to fill each cone to a depth of 9 cm with a diameter of 4 cm

∴ h = 9 cm

∵ r = \frac{1}{2} diameter = \frac{1}{2} (4)

∴ r = 2 cm

→ Substitute them in the 2nd rule above to find the volume of each cone

∵ V = \frac{1}{3} (π) (2)² (9)

∴ V = 12π cm³

→ To find the number of cones divide the volume of the batter by

   the volume of each cone

∵ Number of cones = 2277 ÷ 12π

∴ Number of cones = 60.3993

→ We will take the whole number only because we need the whole cones

∴ Alandra can fill 60 whole cones

6 0
3 years ago
Help on second question ​
Anna35 [415]

Answer:

0.36

Step-by-step explanation:

you add the probability's together

quite simple really. -3-

3 0
3 years ago
Which of the following is an example of a matched pairs design? A. A teacher calculates the average scores of students on a pair
Mashutka [201]

Answer:

B. A teacher compares the pre-test and post-test scores of students

Step-by-step explanation:

the answer is true, because it is a good example to compare the tests between students, we know that a matching pair design is a random model and is used when the experiment allows grouping subjects in pairs based on a variable and each pair will receive randomly a different handling, the answer A is not true because in the example all students are uniformly averaged and the variable is not correlated with subgroups, option c is incorrect because the variable was not randomized and generates classification bias and the option d is incorrect because the teacher compares a small sample as her class with a score of a total sample, but does not intervene on her students when selecting the corresponding group

5 0
3 years ago
Jeb just turned 18 years old. He spent 4/9 of his life living in
nignag [31]

Answer:

8

Step-by-step explanation:

4/9 of 18 is 8

8 0
2 years ago
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