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3 years ago

13

Jamar is playing a video game. The object of the game is to roll a marble into a target. In the figure, the

2 answers:

OleMash [197]3 years ago

3 0

Answer:

Jamar should hit the wall opposite to the side of the barrier(if there is a space), which will cause the ball to bounce off the wall at an angle and into Target.

Brrunno [24]3 years ago

3 0

Answer: (0,2)

Step-by-step explanation:

You have to get from M to T without touching the barrier. What you do is you reflect M across the edge of the screen (y axis) and you should get (0,-1). After you do that connect T to M’ and the y intersect is your answer, (0,2)

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Evaluate the expression 4b-6d if b=7 and d=3

Delicious77 [7]

Answer:

Step-by-step explanation:

4b - 6d = 4*7 - 6*3

= 28 - 18

= 10

4 0

3 years ago

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The concentration of dichlorodiphenyltrichloroethane (DDT - an infamous pesticide) in Lake Michigan has been declining exponenti

mojhsa [17]

Answer: A) $y=13e^{-0.1359t}$

B) H = 5.10

C) Yes

Step-by-step explanation: <u>Exponential</u> <u>Decay</u> <u>function</u> is a model that describes the reducing of an amount by a constant rate over time. Generally, it is written in the form: $y(t)=Ce^{rt}$

A) C is initial quantity, in this case, the initial concentration of DDT. To determine r, using the data given:

$y(t)=Ce^{rt}$

$2.22=13e^{13r}$

$e^{13r}=0.1708$

Using a natural logarithm property called <em>power rule:</em>

$13r=ln(0.1708)$

$r=\frac{ln(0.1708)}{13}$

$r=-0.1359$

The decay function for concentration of DDT through the years is $y(t)=13e^{-0.1359t}$

B) The value of H is calculated by $y=C(0.5)^{\frac{t}{H} }$

$2.22=13(0.5)^{\frac{13}{H} }$

$(0.5)^{\frac{13}{H} }=0.1708$

Again, using power rule for logarithm:

$\frac{13}{H} log(0.5)=log(0.1708)$

$\frac{13}{H} =\frac{log(0.1708)}{log(0.5)}$

$\frac{13}{H} =2.55$

H = 5.10

Constant H in the half-life formula is H=5.10

C) Using model $y(t)=13e^{-0.1359t}$ to determine concentration of DDT in 1995:

$y(24)=13e^{-0.1359.24}$

y(24) = 0.5

By 1995, the concentration of DDT is 0.5 ppm, so using this model is possible to reduce such amount and more of DDT.

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2 years ago

A rectangular box has a length of 9 inches, width of 5 inches, and hight of 1 foot. Find the volume of the box in cubic inches.

jarptica [38.1K]

9x5x1 = 45^3 is the answer

4 0

3 years ago

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Which decimal is equivalent to 3/4 ?

pshichka [43]

The decimal 0.75 is equivalent to 3/4

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3 years ago

Determine the relationship described in each table

attashe74 [19]

Answer:

Written below

Step-by-step explanation:

<u><em>The first table is linear</em></u>

the Y differences are +4 going down the table

<em><u>Second is exponential</u></em>

the Y differences are divided by 2 going down the table

<em><u>The third is quadratic</u></em>

The Y differences are first -14, -6, and 2 but then you take those differences to get the differences of +8 down the table

5 0

3 years ago