Solve 3x2 − x = 10

The answer is c. You find the price per ounce. 4.29/24 = .178 then 3.49/18= .193 then 6.39/39= .163 and 2.49/14 = .177. The cheapest is c. Hope this helps!!!

8 0

3 years ago

Shiny White dental insurance costs $258 per year. Approximately one-third of insured people need a filling, which averages $110

sveta [45]

Answer:

about $145.33

Step-by-step explanation:

Consider a group of 15 customers. They will pay ...

15 × $258 = $3870

in premiums each year.

One-third of those, 5 customers, will submit claims for fillings, so will cost the insurance company ...

5 × $110 = $550

And 80% of them, 12 customers, will submit claims for preventive check-ups, so will cost the company ...

12 × $95 = $1140

The net income from these 15 customers will be ...

$3870 -550 -1140 = $2180

Then the average income per customer is this value divided by the 15 customers in the group:

$2180/15 = $145.33

_____

<em>Alternate solution</em>

Above, we chose a number of customers that made 1/3 of them and 4/5 of them be whole numbers. You can also work with one premium and the probability of a claim:

258 - (1/3)·110 - 0.80·95 = 145.33

8 0

3 years ago

Read 2 more answers

The average mass of an ant is approximately 3 × 10 − 3 grams. The average mass of a giraffe is approximately 2 × 10 3 kilograms.

Vika [28.1K]

Given that average mass of an ant $= 3 \times 10^{-3}$ grams.

Given that average mass of a giraffe $= 2 \times 10^{3}$ Kilograms.

Now we have to find about how many times more mass does a giraffe have than an ant. Before carring out any comparision, we must make both units equal.

Like convert kilogram into gram or gram into kilogram.

I'm going to convert kilogram into gram using formula

1 Kg = 1000 g

So the average mass of a giraffe $= 2 \times 10^{3} *10^3$ grams.