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astra-53 [7]
3 years ago
13

When ringing up a customer, a cashier needs 6 seconds to process payment as well as 1

Mathematics
2 answers:
Elena-2011 [213]3 years ago
7 0

Answer:

14

Step-by-step explanation:

to process payment = 6 sec

each item = 1 sec

total = 20 sec

From this information, we can formulate an equation where x = number of items being purchased.

6+1(x) = 20

x=20-6\\x=14

Ivan3 years ago
4 0

Answer:

14 items

Step-by-step explanation:

20 seconds minus the six it takes to process purchase is 14 and if i takes 1 second to scan each item 14 times 1 is 14

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There are 300 calories in three ounces of a certain ice cream. How many calories are there in two pounds?
alexira [117]

Answer:

There will be 200 calories

Step-by-step explanation:

300 divided by 3 = 100

100 multiplied by 2 = 200

3 0
3 years ago
1% of women at age 40 who participate in routine screening have breast cancer. 80% of women with breast cancer get positive mamm
andre [41]

Answer:

0.0776

Step-by-step explanation:

In order to solve this problema, Baye´s rule is used. Ii is expressed as follows:

P(A if B)=(P(B if A)*P(A))/(P(B))

Let A be women who have cancer and let B be women who have positive mammographies

So, P(B if A) would be women with breast cancer get positive mammographies

P(B if A) = 0.8

P(A) would be women with breast cancer

P(A) = 0.01

P(B) would be the women with positive mammographies. We don´t know it.

In order to find it we use law of total probability

P(B) = P(positive mammographies and cancer) + P(positive mammographies without cancer)

P(B) = 0.8*.01+0.096*0.99  

P(B) = 0.103

With P(B) calculated we can complete the equation:

P(A if B)=(0.8*0.01)/0.103=0.0776

Probability is 0.0776

5 0
3 years ago
Spaghetti sauce comes in large and small cylindrical cans. The larger can has a radius and height that are both three times long
Alik [6]
Let S and L be the volumes of the smaller and larger cans respectively...

The volume of a cylinder is:  V=hπr^2 so

S=hπr^2  and we are told that the larger can's dimensions are 3h and 3r respectively so:

L=(3h)π(3r)^2

L=3hπ(9r^2)

L=27hπr^2

Then S/L is:

S/L=(hπr^2)/(27hπr^2)

S/L=1/27 so we can say that:

L=27S, we are told that the volume of the smaller can is 35.28 in^3 so

L=27(35.28) in^3

L=952.56 in^3
5 0
3 years ago
Read 2 more answers
Joe is building a container to hold sand for a beach party. The container will hold 9,000 cubic feet of sand. Of the base of the
Genrish500 [490]

Answer:

The height of the container is 4 feet.

Step-by-step explanation:

A container has the format of a rectangular prism.

It has three dimensions: width(w), length(l), height(h).

The volume is:

V = w*l*h

In this question:

w = 45, l = 50, V = 9000

We have to find the height(length and width are in feet, volume in cubic feet, so the height will be in feet).

V = w*l*h

9000 = 45*50*h

h = \frac{9000}{45*50}

h = 4

The height of the container is 4 feet.

7 0
3 years ago
Write an equation of the line that passes through point (-1, 5) and has the slope m = 4.
PolarNik [594]

Answer:

y=4x+5

Step-by-step explanation:

y=mx+c

gradient =m

y intercept=c

m=4

c=5

so

y=4x+5

4 0
3 years ago
Read 2 more answers
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