75√109.5=1.46
1.2√79.1=65.92
5.2√9.16=1.76
17.1 =17.1
Yes they are equivalent fractions. If you multiply by 2 on both numbers for 2/3, you get 4/6.
Area = base x height /2
Base =26.5
Height =40
26.5 x 40 /2 = 530
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.