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marin [14]
3 years ago
10

Can I get help with these three

Mathematics
1 answer:
Neporo4naja [7]3 years ago
6 0

Answer:

b is the answer

Step-by-step explanation:

1km= 1000m

1hr =60sec

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Martina needs to make a total of 40 deliveries this week. so far she has completed 12 of them. what percentage of her total deli
Luda [366]

Answer: 10 percent

Step-by-step explanation:

because she was supposed to do 40 she did only 12 so it is 10%

7 0
3 years ago
A restaurant customer left ​$1.65 as a tip. The tax was 4 % and the tip was 15​% of the after tax cost. Which information is not
Fed [463]
You dont need the percentage of tip. to calculate the bill, divide 100 by 15, then multiply that number by 1.65, you will get the total of the bill afer tax. if you add 1.65 to the total you get the total after tax and tip
8 0
3 years ago
A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of
Debora [2.8K]

Answer:

0.1546\leq \widehat{p}\leq 0.3513

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

n = 75

x = 0.25 \times 75 = 18.75≈19

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{19}{75}

\widehat{p}=0.253

Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}

=0.253-(1.96)\sqrt{\frac{0.253(1-0.253)}{75}}\leq \widehat{p}\leq0.253+(1.96)\sqrt{\frac{0.253(1-0.253}{75}}

Confidence interval =0.1546\leq \widehat{p}\leq 0.3513

7 0
3 years ago
This data gives the average number of hours different students spend on the computer each day.
Ulleksa [173]

Answer:

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
What does 3-3x6+2 equal?
Mama L [17]
You do 3x6 first to get 18.

You get 3-18+2.

Then you do 3-18 which is -15.

You get -15+2.

Then you do -15+2 which is -13.

It equals -13.
3 0
3 years ago
Read 2 more answers
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