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3 years ago

Help me please , will mark brainliest

Mathematics

2 answers:

gtnhenbr [62]3 years ago

8 0

Answer: 2

Step-by-step explanation:

The radius is half of the diameter.

Sphinxa [80]3 years ago

8 0

Answer:

2 is the correct answer Step-by-step explanation:

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2) Write the equation of a parabola whose vertex is (-3,5) and has a y-intercept of 2

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Answer: Y=(-1/3)x^2-2x+2

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3 years ago

Evaluate x + y + z for x = 2, y = -3, z = -4.

stiks02 [169]

X+Y+Z=2+(-3)+(-4)=-5
That's your answer, lovely~

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3 years ago

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A certain compound has a half-life of four days. Write and use an exponential decay function to find the amount of compound rema

dimaraw [331]

Answer:

1.97 ounces

Step-by-step explanation:

-The exponential decay function is given by the formula:

$P_t=P_oe^{-rt}\\\\$

Given that the half-life is 4 days, we can substitute in the formula to solve the rate of decay for a single half-life:

$P_t=P_oe^{rt}\\\\P_t=0.5P_o\\\\\therefore 0.5=e^{-4r}\\\\-4r=In(0.5)\\\\r=0.17329$

#Since, 1 week has 7 days, 3 weeks is a 21-day period, thus, t=21.

#We substitute and solve for the amount remaining after 21days of decay:

$P_t=P_oe^{-rt}\\\\=75e^{-21\times 0.17329}\\\\=1.97072\\\\\approx1.97 \ oz$

Hence, the amount remaining after 3 weeks of decays is approximately 1.97 ounces

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3 years ago

Mags has 2 1/4 pints of milk in her refrigerator. She lukes to have 1/4 with her oatmeal in the morning.How many bowls of oatmea

Yuliya22 [10]

9; in the two pints there are eight 1/4 pints, and the extra 1/4 makes nine 1/4 pints.

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3 years ago

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Erica had 6 coins in her coin collection. she goes to a coin show and buys some coins. how many dose she have now?

Anuta_ua [19.1K]

Since, it is not given how many coins did Erica buy at the coin show, so, we can suppose that Erica bought "n" coins from the coin show.

Now, we know that Erica already had 6 coins in her coin collection before she went to the coin show and bought the "n" coins.

Therefore, the total number of coins that Erica will have in her possession after buying "n" coins from the coin show will be 6+n.

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3 years ago