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grandymaker [24]
3 years ago
9

Given the vectors a and b, with lengths 21 and 44 respectively, and cosine of the angle between them equal to StartFraction 7 Ov

er 12 EndFraction, find the scalar projection of a onto b and a · b.
ab =
a · b =
Mathematics
2 answers:
rjkz [21]3 years ago
8 0

Answer:

ab= 49/4

a . b= 539

Step-by-step explanation:

Edge2020

algol [13]3 years ago
3 0

Answer:

First = 49/4

Second = 539

Step-by-step explanation:

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Yesterday, there were b milligrams of bacteria in a lab experiment. Today, there are b^2 milligrams of bacteria. If there are 40
Ksju [112]

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A

Step-by-step explanation:

b^2 = 400

b = 20.............

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Explain how you compared the fractions in Exercise 9
natima [27]

that question doesnt make sense!

6 0
3 years ago
HURRY!!! Find a unit rate: You bought 10 pounds of potatoes for $4
sergeinik [125]
2.5 pounds of potatoes per dollar
7 0
4 years ago
Read 2 more answers
The cost of health insurance is $900 per month. The cost of an operation for a dramatic injury is $500,000. The chances of someo
lord [1]

Answer:

Yes, It is better to buy the insurance.

Step-by-step explanation:

Given Data:

Cost of Health Insurance for a month = 900$ per month

As 20 Years = 20*12 months = 240 months

Cost of Health Insurance for 20 years = 900 * 240

Cost of Health Insurance for 20 years = 216,000$

Insurance claim in case of having dramatic injury = Cost of Dramatic Injury = 500,000$

Insurance claim in case of having no dramatic injury = 0$

Chances of dramatic injury in 20 years = P(A) = 47.3%

Chances of not having dramatic injury in 20 years = P(B) = 100% - 47.3%

Chances of not having dramatic injury in 20 years = P(B) = 52.7%

Expected Insurance Claim for 20 years:

Expected Insurance Claim for 20 years = (Chances of having dramatic injury in 20 years * Insurance claim) + (Chances of not having dramatic injury * Insurance claim)

Expected Insurance Claim for 20 years = P(A) * 500,000$ + P(B) * 0$

Expected Insurance Claim for 20 years = 47.3% * 500,000 + 52.7% * 0

Expected Insurance Claim for 20 years = 236500 + 0

Expected Insurance Claim for 20 years = 236,500$

Expected Profit:

As expected insurance claim is 236,500$ is more than the cost of health insurance for 20 years and we are expected to have profit of 20,500$, thus we should take the health insurance.

3 0
3 years ago
(4m-3n)^2 Multiplying Polynomials
Sindrei [870]

Answer:

4m²-24mn+9n²

Step-by-step explanation:

  1. Separate equation out so it is (4m-3n)×(4m-3n)
  2. FOIL (First, Outside, Inside, Last) your polynomial
  3. Should have equation 4m²-12mn-12mn+9m²
  4. Combine like terms
  5. Result: 4m²-24mn+9m²
8 0
3 years ago
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