3 years ago

Ntial)

Mathematics

1 answer:

luda_lava [24]3 years ago

6 0

B is the correct answer

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2^x=1/128 solve the equation

madam [21]

Answer:

x = − 7

Step-by-step explanation:

y = 4.5*x^2-9*x+8.5;4.5;-9;8.5

-(((-9)^2-(4*4.5*8.5))/(4*4.5))

-(-9/(2*4.5))

4.5*0^2-(0*9)+8.5

(7*x^5-(5*x^7))^(1/2)+1/((7*x^5-(5*x^7))^(1/2))

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3 years ago

How long will it take for the balance of an account to double if the savings account earns 0.75% annual interest compounded mont

Margarita [4]

You're looking for the time $t$ that it takes for the principal $P$ to double, so $A=2P$ . Dividing both sides of the formula by $P$ leaves you with

$2=\left(1+\dfrac rn\right)^{nt}$

You're given that the account earns 0.75% interest and that the interest is compounded monthly, so $r=0.0075$ and $n=12$ .

$2=\left(1+\dfrac{0.0075}{12}\right)^{12t}$
$\ln2=\ln\left(1+\dfrac{0.0075}{12}\right)^{12t}$
$\ln2=12t\ln\left(1+\dfrac{0.0075}{12}\right)$
$t=\dfrac{\ln2}{12\ln\left(1+\dfrac{0.0075}{12}\right)}\approx92.45$

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3 years ago

So my problem says 'Nisha wants to study 5 hours for the spelling bee. If she studies 1/3 hour per night, how many nights will s

photoshop1234 [79]

Forgive me if I am wrong but it should be 15 hours. If she only studies 1/3 an hour a night it would take 3 1/3 nights so you'd just multiply 3 by 5. If that makes any sense. Sorry not to good at explaining things ;(

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4 years ago

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vlada-n [284]

1,2,3,4,6,7,12,14,21,28,42,84 are the prime factors of 84.

Therefore, the first four primes are: 1,2,3,7 so Mr. Nolans code is 1237.

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3 years ago

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VARVARA [1.3K]

Answer: 8:6, 12:9, and 16:12

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3 years ago

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