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spin [16.1K]
3 years ago
15

Solve for b Pythagorean

Mathematics
1 answer:
Vaselesa [24]3 years ago
7 0

The figure shows a right triangle at each corner with legs 3 and b and hypotenuse 4. The Pythagorean theorem tells you the sum of the squares of the legs is equal to the square of the hypotenuse:

3² + b² = 4² . . . . . . put the numbers into the Pythagorean formula

9 + b² = 16 . . . . . . . evaluate the squares

b² = 16 - 9 = 7 . . . . subtract 9 to isolate the variable

b = √7 . . . . . . . . . . undo the square operation by taking the square root

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The value of a certain car decreases by 16% each year. What is the 1⁄2-life of the car?
svet-max [94.6K]

Answer:

The half life of the car is 3.98 years.

Step-by-step explanation:

The value of the car after t years is given by the following equation:

V(t) = V(0)(1-r)^{t}

In which V(0) is the initial value and r is the constant decay rate, as a decimal.

The value of a certain car decreases by 16% each year.

This means that r = 0.16

So

V(t) = V(0)(1-r)^{t}

V(t) = V(0)(1-0.16)^{t}

V(t) = V(0)(0.84)^{t}

What is the 1⁄2-life of the car?

This is t for which V(t) = 0.5V(0). So

V(t) = V(0)(0.84)^{t}

0.5V(0) = V(0)(0.84)^{t}

(0.84)^{t} = 0.5

\log{(0.84)^{t}} = \log{0.5}

t\log{0.84} = \log{0.5}

t = \frac{\log{0.5}}{\log{0.84}}

t = 3.98

The half life of the car is 3.98 years.

7 0
3 years ago
What fraction of 1 quart is 3 cups
Rasek [7]
There are two cups in one pint and there are two pints in one quart. That means that there are four cups in one quart. Three cups would be 3/4 of a quart.

Hope that helped =)
5 0
3 years ago
Which is greater 4/5 or 60%<br><br> i need help
Kisachek [45]

Answer:

4/5 is greater

Step-by-step explanation:

60% = 60/100

4/5 = 80/100

80>60

5 0
3 years ago
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The last 40 boat rentals at a boat rental company were 22 sunfish, 10 kayaks, and 8 rowboats.
Slav-nsk [51]
So whats the question my guy??
3 0
2 years ago
What is 0.1m + 8 - 12n when m = 30 and n= 1/4
tia_tia [17]

Answer:

8

Step-by-step explanation:

Replace your variables with the numbers given.

0.1m + 8 - 12n =

0.1 · 30 + 8 - 12 · 1/4 =

8

3 0
3 years ago
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