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Aliun [14]
3 years ago
14

A manufacturer claims that its cleaning product is best because over half of the cleaning services surveyed used the product. Wh

ich BEST decreases the validity of the claim? A.Only 50 cleaning services were surveyed. B.Cleaning services were selected at random. C.A well-known company conducted the survey. D.Only one cleaning product was asked about in the survey.
Mathematics
1 answer:
balu736 [363]3 years ago
8 0

Answer:

D. Only one cleaning product was asked about in the survey.

Any given company can use more than one cleaning product or even use a combination of different cleaning products. The question was not specific enough, since it should have probably asked which cleaning products are used and which ones are used more frequently.

Step-by-step explanation:

the other options are wrong because:

  • A. Only 50 cleaning services were surveyed. ⇒ This actually would increase the validity of the claim because it satisfies the the condition for a valid confidence interval [np and n(1 - p) are larger than 10]-
  • B. Cleaning services were selected at random. ⇒ This actually would increase the validity of the claim.
  • C. A well-known company conducted the survey. ⇒ This actually would increase the validity of the claim.

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A shark is at -80 feet. It swims up and jumps out of the water to a height of 15 feet. Write a subtraction expression for the ve
SpyIntel [72]

15-(-80)=95

he jumped 95 ft.


6 0
3 years ago
what is the hight of a cylinder with a volume of 384tt cubic inches and a radius of 8 inches? round to the nearest tenth of an i
skelet666 [1.2K]

Answer:

1.9 inches

Step-by-step explanation:

We need to utilise one important formula in this question which is the volume of a cylinder formula. We need to work out the height of the cylinder given the following information that the radius is 8 inches and the volume is 384 cubic inches. We can set up an equation to find the value of the height so,

→ π × r² × h = 384

⇒ Substitute in 8 for 'r'

→ π × 8² × h = 384

⇒ Simplify

→ π × 64 × h = 384

⇒ Divide both sides by 64 to isolate π and h

→ π × h = 6

⇒ Divide both sides by π to isolate 'h' and find the value of the height

→ h = 1.9098593171

The height of a cylinder with a volume of 384 cubic inches and a radius of 8 inches is 1.9 inches

5 0
2 years ago
Given a circle with centre O and radius 2.4cm. P is a point such that the lenght of the tengent from Q to the circle is 4.5cm. F
skelet666 [1.2K]

Answer:

5.1 cm

Step-by-step explanation:

(Probable) Question;

Given a circle with center <em>O</em> and radius 2.4 cm.<em> P</em> is a point on the tangent that touches the circle at point <em>Q</em>, such that the length of the tangent from <em>P </em>to <em>Q</em> is 4.5 cm. Find the length of OP

The given parameters are;

The radius of the circle with enter at <em>O</em>, \overline{OQ} = 2.4 cm

The length of the tangent from<em> P</em> to the circle at point <em>Q, </em>\overline{PQ} = 4.5 cm

The length of OP = Required

By Pythagoras's theorem, we have;

\overline{OP}² = \overline{OQ}² + \overline{PQ}²

∴ \overline{OP}² = 2.4² + 4.5² = 26.01

\overline{OP} = √26.01 = 5.1

The length of OP = 5.1 cm

8 0
2 years ago
I need help please???
Luba_88 [7]
The answer is 6 and 2/3
3 0
3 years ago
Read 2 more answers
Simplify:<br> 5 1/2 - 2 1/4<br> 1 3/4 + 1 1/2
EastWind [94]
A) 5 1/2 - 2 1/4
5-2 = 3
1/2 - 1/4 = 1/4
Final Answer: 3 1/4 or in decimal 3.25

B) 13/4 + 11/2
35/4 = 8 3/4
Final Answer: 8 3/4 or in decimal 8.75
5 0
3 years ago
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