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lukranit [14]
3 years ago
10

Jasmine had 50 cans and collects 5 additional cans per week for a food drive. Leandra has no cans but collects 10 cans per week.

After how many weeks will they have the same number of cans?
Mathematics
2 answers:
xxTIMURxx [149]3 years ago
6 0
10 weeks is the answer
gulaghasi [49]3 years ago
3 0

10 weeks

50 cans+additional 5 per week

5×10=50

100

10 per week

10×10=100

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The overhead reach distances of adult females are normally distributed with a mean of 205 cm and a standard deviation of 8.3 cm.
Gre4nikov [31]

a. Find the probability that an individual distance is greater than 214.30 cm

We find for the value of z score using the formula:

z = (x – u) / s

z = (214.30 – 205) / 8.3

z = 1.12

Since we are looking for x > 214.30 cm, we use the right tailed test to find for P at z = 1.12 from the tables:

P = 0.1314

 

b. Find the probability that the mean for 20 randomly selected distances is greater than 202.80 cm

We find for the value of z score using the formula:

z = (x – u) / s

z = (202.80 – 205) / 8.3

z = -0.265

Since we are looking for x > 202.80 cm, we use the right tailed test to find for P at z = -0.265 from the tables:

P = 0.6045

 

c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30?

I believe this is because we are given the population standard deviation sigma rather than the sample standard deviation. So we can use the z test.

7 0
3 years ago
While walking from her house to school, Miriam walks at a pace of 5 km/h. When she walks in the hallways at school, she slows do
lubasha [3.4K]
5* 2.5= 12.5, 3/4 of 3.5 is 2.625. add those to get 15.125. divide by the hours(3.25) and the answer is-  4.65 km/hr
3 0
4 years ago
Please help me. i am so confused please
sveticcg [70]

Answer:

what is the question above what you are showing in the picture ?

Step-by-step explanation:

it will help a lot

5 0
4 years ago
Read 2 more answers
Simon used 3 pears and 9 apples to make a salad. what was the ratio of the number of pears to the number of apples in the salad?
Levart [38]

The answer is A

3 divided by 3 is 1

9 divided by 3 is 3

5 0
3 years ago
A lunch menu has a 4-piece lunch special which consists of a sandwich, soup, dessert and drink. They offer the following choices
ryzh [129]

Answer:

There are 160 possible 4-piece lunch special meal.

Step-by-step explanation:

The lunch menu has a 4-piece lunch special which consists of a sandwich, soup, dessert and drink.

The available options for the sandwiches, soups, desserts and drinks are:

Sandwich: chicken, cheese and tomato, tuna, ham and lettuce, turkey

Soup: tomato, chicken noodle, vegetable

Dessert: ice-cream, piece of cake

Drink: tea, coffee, Coke, Sprite

So, the number of options are:

n (Sandwich) = n (A) = 5

n (Soup) = n (B) = 4

n (Dessert) = n (C) = 2

n (Drink) = n (D) = 4

There are 5 ways to select a sandwich, 4 ways to select a soup, 2 ways to select a dessert and 4 ways to select a drink.

The total number of possible 4-piece lunch special is:

Total number of 4-piece lunch special = n (A) × n (B) × n (C) × n (D)

                                                                =5\times4\times2\times4\\=160\\

Thus, there are 160 possible 4-piece lunch special meal.

8 0
3 years ago
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