How do you find the discrimminant in algebra?

Answers

Answer 1

Answer:

Step-by-step explanation:

the discriminant is the part of the quadratic formula underneath the square root symbol : b2 -4ac . the discriminant tells as whether there are two solutions ,one solution , or no solution....

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Complete the statement, then write the postulate you used. Please help! I’ll give brainliest!
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PLEASE HELP!! The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 195 grams of a radioactive isotope, how much will be left after 6 half-lives?
Use the calculator provided and round your answer to the nearest gram.

Answers

Answer:

3.047

Step-by-step explanation:

I'm not completely sure but i think its close

Final answer:

Applying the concept of half-life, if we start with 195 grams of a radioactive isotope, after 6 half-lives, we would be left with approximately 3 grams of the isotope.

Explanation:

The half-life concept is very important in Nuclear Physics, especially when we deal with Radioactive Isotopes. Regarding your question, if an isotope has a half-life, it means after each half-life, the quantity of the isotope decreases by half. So, to determine the remaining mass of a radioactive isotope after 6 half-lives, we have to consecutively halve the initial mass 6 times.

After the first half-life, 195 grams will become 97.5 grams.
After the second half-life, 97.5 grams will become 48.75 grams.
After the third half-life, 48.75 grams will become 24.375 grams.
After the fourth half-life, 24.375 grams will become 12.18 grams.
After the fifth half-life, 12.18 grams will become 6.09 grams.
After the sixth half-life, 6.09 grams will become around 3 grams (when rounded to the nearest gram).

So, after 6 half-lives, there will be approximately 3 grams of the isotope left.

Learn more about Half-life here:

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Find the sum 93.5+8.7

Answers

Answer:

102.2 is your answer

hope this helped you

please mark as the brainliest (ㆁωㆁ)

A:

93.5
+ 8.7
———
102. 2

Always make sure before adding to place ur decimal down before u add. It’ll help u a lot.

Please mark brainliest :/

Jodi is retiring at the age of 65. When she retires, she estimates that she will need a monthly income for 25 years. If Jodi starts with $328,133.32 in an account that pays 6.2% interest compounded monthly, approximately what monthly income will she be able to draw? a. $2,665 b. $2,154 c. $1,948 d. $1,094

Answers

Jodi can draw a monthlyincome of approximately $2,154 from her investment.

Option B is the correct answer.

What is compound interest?

It is the interest we earned on the interest.

The formula for the amount earned with compoundinterest after n years is given as:

A = P $(1 + r/n)^(nt)$

P = principal

R = rate

t = time in years

n = number of times compounded in a year.

We have,

The first step to solve this problem is to find the futurevalue (FV) of the initial investment of $328,133.32 over 25 years, compounded monthly at 6.2% interest rate.

We know that the futurevalue (FV) can be calculated using the formula:

$FV = PV * (1 + r/12)^(n *12)$

Where:

PV = Present value (initial investment) = $328,133.32

r = Interest rate per year = 6.2%

n = Number of years = 25

Substituting the values, we get:

$FV = $328,133.32 * (1 + 0.062/12)^(25 * 12)$

FV ≈ $889,076.76

The futurevalue (FV) of the investment after 25 years is approximately $889,076.76.

Next, we need to calculate the monthlyincome that Jodi can draw from this investment.

To do this, we can use the formula for the present value (PV) of an annuity:

$PV = C * [1 - (1 + r/12)^(-n *12)] / (r/12)$

Where:

C = Monthly income

r = Interest rate per year = 6.2%

n = Number of years = 25

We need to solve for C, which is the monthly income that Jodi can draw from the investment.

Substituting the values, we get:

$$889,076.76 = C * [1 - (1 + 0.062/12)^(-25 * 12)] / (0.062/12)$

Simplifying this equation, we get:

C ≈ $2,153.96

Therefore,

Jodi can draw a monthlyincome of approximately $2,153.96 from her investment.

Rounding to the nearest dollar, the answer is B. $2,154.

Learn more about compoundinterest here:

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Answer:

Answer is B just took the test.

Step-by-step explanation:

Carly bought a new house for $125,000. The value of the house appreciates approximately 3.5% each year. What will be the value of the house after 10 years?

Answers

This problem can be solved using the formula for interest which is: F = P (1 + i)^n where:

F = future value
P = principal value
i = interest per year
n = interest period

Since we are already provided with the values of each, direct substitution should be done. This is shown below:

F = P(1 + i)^n
F = 125000(1 + 0.035)^10
F = 176324.85

Therefore, the value of the house after 10 years will be $176,324.85

Convert the number below from exponential to standard notation.6(104) + 4(103) + 8(102) + 1(101) + 7(100)

6,481,700
648.17
648,170
64,817

Answers

$6(10^4) + 4(10^3) + 8(10^2) + 1(10^1) + 7(10^0)\n\n = 6(10,000) + 4(1,000) + 8(100) + 1(10) + 7(1)\n\n=60,000 + 4,000 + 800 + 10 + 7\n\n = \boxed{\bf{64,817}}$

Your answer is D.

Some students attend school 180 of the 365 days in a year. About what part of the year do they attend school?

Answers

If 365 is 100% and 180 is about 50% then your answer is 50%.

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