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3 years ago

Find a vector b if: It has the same direction as 2,-1and haslength of 3 units

Mathematics

1 answer:

Gnom [1K]3 years ago

7 0

Answer:

I dunno just need the points sorry

Step-by-step explanation:

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The cost of a High Definition television now averages $700, but the cost is decreasing about 15% per year. In how many years wil

Roman55 [17]

Answer: 7.7 years

Step-by-step explanation:

Given

The cost of HD TV is $700 and it is decreasing at the rate of 15% per year

After one year it becomes

$\Rightarrow 700-700\times 15\%\\\Rightarrow 700(1-0.15)$

after 2 year it becomes

$\Rightarrow 700(1-0.15)-700(1-0.15)\times 15\%\\\Rightarrow 700(1-0.15)(1-0.15)\\\Rightarrow 700(1-0.15)^2$

Suppose, after x years it becomes $200

$\Rightarrow 200=700(1-0.15)^x\\\\\Rightarrow \dfrac{2}{7}=0.85^x\\\\\text{Taking log both sides}\\\\\Rightarrow x=\dfrac{\ln (\frac{2}{7})}{\ln (0.85)}\\\\\Rightarrow x=7.7\ \text{years}$

Thus, it takes 7.7 years for the cost to come under $200.

3 0

3 years ago

a board game that normally costs $30is on sale for 25 percent off. what is the sale price of the game

telo118 [61]

Answer:

22.5

Step-by-step explanation:

Hey there! first, we find 25% of 30 which equals 7.5 then we subtract 30 - 7.5 which is 22.5

8 0

3 years ago

Read 2 more answers

Savatey [412]

Answer: 8 hours

Step-by-step explanation: First, find the unit rate. For one hour of work, she earns 0.05263157894. Multiply this number 152.

4 0

3 years ago

Last week, Jane made deposits of

liraira [26]

Answer:

b. $25

Step-by-step explanation:

64 + 25 + 37 - 52 - 49 = 25

6 0

3 years ago

Penny reads 11 pages in 1/3 hour. How many pages does she read per hour?

dolphi86 [110]

Answer:

33 pages per hour

Step-by-step explanation:

11 pages=1/3 hour

22 pages=2/3 hour

33 pages= 3/3 hour or 1 hour

5 0

3 years ago

Find a vector b if: It has the same direction as 2,-1and haslength of 3 units​

Find a vector b if: It has the same direction as 2,-1and haslength of 3 units