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Nezavi [6.7K]
3 years ago
5

BRAINLIEST ASAP! PLEASE HELP ME :)

Mathematics
1 answer:
Afina-wow [57]3 years ago
3 0

Answer:

\large \boxed{\textbf{30.54 yr}}

Step-by-step explanation:

For species A,

P =2000e^{0.05t}

For species B,

P =5000e^{0.02t}

When their populations are equal,

\begin{array}{rcl}2000e^{0.05t} & = & 5000e^{0.02t}\\e^{0.05t} & = & 2.5e^{0.02t}\\0.05t & = & \ln2.5 + 0.02t\\0.05t & = & 0.9163 + 0.02t\\0.03t & = & 0.9163\\t& = & \dfrac{0.9163}{0.03}\\\\& = & \mathbf{30.54}\\\end{array}\\\text{The populations of species A and B will be the same in $\large \boxed{\textbf{30.54 yr}}$}

The diagram below shows the population of Species A overtaking that of Species B in about 30.5 yr.

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Paul [167]

Answer:

Common denominator = 20

New fractions are: \dfrac{15}{20}\ and\ \dfrac{4}{20}

Step-by-step explanation:

Given:

The fractions are given as:

\dfrac{3}{4}\ and\ \dfrac{1}{5}

The denominators of the first fraction is 4 and that of the second fraction is 5.

In order to find the common denominator for 4 and 5, we have to find the least common multiple of each of the numbers.

Multiples of 4 = 4, 8, 12, 16, <u>20</u>, 24, 28,....

Multiples of 5 = 5, 10, 15, <u>20</u>, 25, 30,....

Therefore, the least common multiple of 4 and 5 is 20. So, the common denominator is 20.

Now, multiply the numerator and denominator of each fraction by the same suitable number such that the denominator becomes 20.

So, for the first fraction, 4 is in the denominator.

So, 4 when multiplied by 5 gives 20.

So, we multiply the numerator and denominator of first fraction by 5. This gives,

\dfrac{3}{4}=\dfrac{3\times 5}{4\times 5}=\dfrac{15}{20}

Now, for the second fraction, 5 is in the denominator.

So, 5 when multiplied by 4 gives 20.

So, we multiply the numerator and denominator of first fraction by 4. This gives,

\dfrac{1}{5}=\dfrac{1\times 4}{5\times 4}=\dfrac{4}{20}

Therefore, the new fractions after making the denominators same are:

\dfrac{15}{20}\ and\ \dfrac{4}{20}

4 0
3 years ago
Chris goes to Matt’s hamburger store to buy an hamburger. Each hamburger must contain exactly one bread, one lettuce, one cheese
denis-greek [22]

Answer:

216

Step-by-step explanation:

2 * 2 * 3 * 3 * 6 = 216

6 0
3 years ago
What number must be placed in the box in the equation below to produce an equation that has more than one solution: 5u+3(4u-6)=-
Sergeeva-Olga [200]

Answer: the number must be placed in the box is 9

suppose: the number must be placed in the box is x

have:

5u + 3(4u - 6) = -3u -27 + 20u + x

⇔ 5u + 12u - 18 = -3u - 27 + 20u +x

⇔ 17u + 3u - 20u = -27 + 18 + x

⇔ 0 = x - 9

⇔ x = 9

Step-by-step explanation:

7 0
3 years ago
MARKING BRAINIEST!! A wheelchair ramp is 10 feet long. the ramp sits up on a 2 foot platform. How far is it from the end of the
irina [24]

Answer:

The distance between the end of the ramp and the bottom of the platform is about 9.8 feet

Step-by-step explanation:

use the pythagorean theorem (a²+b²=c²) to solve

a and b are the legs, c is the hypotenuse

plug in given values:

2² + x² = 10²

solve for x:

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x² = 96

x ≈ 9.80

4 0
3 years ago
Solve for x in the triangle.Round your answer to the nearest tenth.
enyata [817]

sin = opposite/hypotenuse

sin 40° = 12/x

Cross multiply.

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Divide both sides by sin 40°.

x = 18.7 (rounded to nearest tenth).

5 0
3 years ago
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