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LuckyWell [14K]
3 years ago
11

I need help with numbers 9and 10

Mathematics
1 answer:
AlekseyPX3 years ago
5 0
For monthly membership, the cost must be less than $325. We can set up an inequality:-

100 + 30x < 325            where x = number of months of membership

Solving -

30x < 325-100 = 225

x < 225 / 30

x < 7.5 months

The answer is   7 months.
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What is $2088.523125 Rounded to the nearest dollar?<br>​
Inessa05 [86]

9514 1404 393

Answer:

  $2089

Step-by-step explanation:

One way to do this rounding is to add $0.50, then drop all of the fractional digits.

  $2088.523125 + 0.50 = $2089.023125

Dropping all of the digits right of the decimal point gives $2089.

7 0
3 years ago
\WILL GIVE BRAINLY, PLEASE HELP
MissTica

Answer:

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Step-by-step explanation:

3 0
3 years ago
Aubrey is making cone-shaped hats for a birthday party. She mistakenly thinks that she will need about 104 square inches of pape
jenyasd209 [6]

Answer:

C. About 75 in²; Aubrey found the surface area of the cone and included the base.

Step-by-step explanation:

In the questions above we were given the following:

Cone with

Diameter(D) = 6 inches

Slant height (l) = 8 inches.

Aubrey made an error in her calculation.

She found the Total Surface area of the cone using the formula:

Total Surface Area of a cone = πrl + πr²

= πr(l + r)

The Total surface area of a cone is the calculated as Sum of the curved surface area of a cone and the base of the cone.

Where:

Curved surface area of the cone is calculated as = πrl

Base of a cone is calculated as = πr²

Where r = radius of the cone

l = slant height of the cone

In the question, we were given

slant height(l) = 8 inches.

radius = Diameter ÷ 2 = 6÷2 = 3 inches.

Using π = 3.14

Surface area = 3.14 × 3(8+3)

= 9.42 × 11

Surface area = 103.62 in²

Approximately to the nearest inch = 104 in² or 104 square inches.

But this answer is WRONG.

The RIGHT FORMULA Aubrey should have used is

Curved Surface Area or the Lateral Area of a Cone = πrL

slant height(l) = 8 inches.

radius = Diameter ÷ 2 = 6÷2 = 3 inches.

Using π = 3.14

Curved Surface Area of a Cone = πrL

= 3.14 × 3 inches × 8 inches

= 75.36 square inches or 75.36in²

Approximately to the nearest inch = 75 square inches or 75 in².

This is the correct answer.

The error Aubrey made was she calculated the Total surface area of the cone which includes the base of the cone instead of calculating the curved surface area of the cone only.

Hence, from the above calculation , we can see that Option C "About 75 in²; Aubrey found the surface area of the cone and included the base" is the correct option.

5 0
3 years ago
Solve for y. x a = yb
timofeeve [1]
Xa = yb
yb = xa
y = xa/b
7 0
3 years ago
What is the circumference of this circle, in centimeters? Use for .
Orlov [11]

Answer:

what is the circle.

Circumference is diameter x 3.14.

Diameter is the whith of a circle.

Ex. diameter = 4

4 x 3.14 = 12.6cm.

Step-by-step explanation:

5 0
3 years ago
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