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Mars2501 [29]
3 years ago
12

It costs $3.45 to buy 1/2 lb. of chopped walnuts. How much would it cost to purchase 7 lbs. of walnuts?

Mathematics
2 answers:
Rasek [7]3 years ago
8 0

Answer:

3.45/0.5= 6.9

6.9*7=48.3

Step-by-step explanation:

e-lub [12.9K]3 years ago
5 0

Answer:It would cost $48.3

Step-by-step explanation:7 lb is 14 times 1/2 lb. If you want to figure out the price youd multiply 3.45 by 14 as well. Youd get 48.3 in that case

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Chandra runs 10 miles. After every two miles, she checks the time. The scatter plot shows her results.
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Answer: 7.5

Step-by-step explanation:

Per 2 mile she ran 15m

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3 years ago
What should I buy? A study conducted by a research group in a recent year reported that of cell phone owners used their phones i
Llana [10]

Answer:

The probability that seven or more of them used their phones for guidance on purchasing decisions is 0.7886.

<em />

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>What should I buy? A study conducted by a research group in a recent year reported that 57% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 14 cell phone owners is studied. Round the answers to at least four decimal places. What is the probability that seven or more of them used their phones for guidance on purchasing decisions? </em>

We can model this as a binomial random variable, with p=0.57 and n=14.

P(x=k)=\dbinom{n}{k} p^{k}q^{n-k}

a) We have to calculate the probability that seven or more of them used their phones for guidance on purchasing decisions:

P(x\geq7)=\sum_{k=7}^{14}P(x=k)\\\\\\

P(x=7)=\dbinom{14}{7} p^{7}q^{7}=3432*0.0195*0.0027=0.1824\\\\\\P(x=8) = \dbinom{14}{8} p^{8}q^{6}=3003*0.0111*0.0063=0.2115\\\\\\P(x=9) = \dbinom{14}{9} p^{9}q^{5}=2002*0.0064*0.0147=0.1869\\\\\\P(x=10) = \dbinom{14}{10} p^{10}q^{4}=1001*0.0036*0.0342=0.1239\\\\\\P(x=11) = \dbinom{14}{11} p^{11}q^{3}=364*0.0021*0.0795=0.0597\\\\\\P(x=12) = \dbinom{14}{12} p^{12}q^{2}=91*0.0012*0.1849=0.0198\\\\\\P(x=13) = \dbinom{14}{13} p^{13}q^{1}=14*0.0007*0.43=0.004\\\\\\

P(x=14) = \dbinom{14}{14} p^{14}q^{0}=1*0.0004*1=0.0004\\\\\\

P(x\geq7)=0.1824+0.2115+0.1869+0.1239+0.0597+0.0198+0.004+0.0004\\\\P(x\geq7)=0.7886

7 0
3 years ago
Jessica has $50 to spend on new clothes.
Zigmanuir [339]

Answer:

Answer: No

Step-by-step explanation:

You multiply 48 ×0.06 which is $2.88 in tax so it will bring the total to 51.08

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its A

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