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3 years ago

Maria’s phone bills were 95 67 43 and 115 what is the mean or average of her phone bill

Mathematics

2 answers:

Vesna [10]3 years ago

5 0

Answer:

Step-by-step explanation:

You have to add all of the numbers together and divide them by how many numbers there are.

95 + 67 + 43 + 115 = 320

320 / 4 = 80

Scorpion4ik [409]3 years ago

5 0

Add all the amounts together and divide by the number of bills:

95+ 67+43+115 = 320

Average = 320 / 4 = 80

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A colony of cats were introduced into a reserve. The number of cats present at timet(measured in years since the colony was intr

RUDIKE [14]

ANSWER:

a) 12 cats

b) 232

c) 246

d) 14

EXPLANATION:

Given the expression for number of cats C present at time t:

$C\text{ = }\frac{12.31}{0.05+0.56^t^{}}$

a) To find the number of cats initially on the reserve, let t = 0

Therefore, substitute 0 for t in the equation

$\begin{gathered} C\text{ = }\frac{12.31}{0.05+0.56^0} \\ \text{ = }\frac{12.31}{0.05\text{ + 1}} \\ \text{ = }\frac{12.31}{1.05} \\ =\text{ }11.72 \end{gathered}$

Number of cats initially on the reserve are approximately 12 cats

b) C(10):

$\begin{gathered} C(10)\text{ = }\frac{12.31}{0.05+0.56^{10}}\text{ = 232.12} \\ \end{gathered}$

C(10) = 232

Here, C(10) means that C is a function of 10. This means at time = 10 years

C)Using function notation to express the number of cats present after 17 years, we have:

$C(17)\text{ = }\frac{12.31}{0.05+0.56^{17}}$

$C(17)\text{ = }\frac{12.31}{0.05+0.56^{17}}\text{ = }245.94$

Therefore, number of cats present after 17 years are approximately 246 cats

C(17) = 246 cats

d) In this case, first find the number of cats present in the 10th year and subtract from the number of cats present in the 17th year.

$C(10)\text{ = }\frac{12.31}{0.05+0.56^{10}}=\text{ }232.12$

From question C above, we know C(17) = 246

Therefore, the increase in cat population to be expected from the 10th year to the 17th year is:

C(17) - C(10) = 246 - 232 = 14 cats

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1 year ago

A bag of dog food contains a total of 160 cups. How many cups was the dog fed each day, if the

Vladimir [108]

Answer:

380 cups

Step-by-step explanation:

Total cups=160

If 160 cups food lasted for 40 days then

Food lasted for 1 day=160/40

=4 cups

Amount of food required for 95 days=95×4

=380 cups

7 0

3 years ago

Read 2 more answers

Find (ƒ – g)(x) where ƒ(x) = 2x2 + 5x – 8, g(x) = –x2 + 6x.

STatiana [176]

Answer:

Step-by-step explanation:

ƒ(x) = 2x2 + 5x – 8

g(x) = –x2 + 6x

(ƒ – g)(x)=2x2+5x-8-(-x2+6x)

=2x2+5x-8+x2-6x

=3x2-x-8

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3 years ago

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kozerog [31]

Answer:

X is less than or equal to -3

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The sum of five times a number, x, and another number, y, is 54. the difference of x and y is 2. find x and y

svp [43]

<span>2(20 - y) - 4y = 4

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3 years ago