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2 years ago

Please tell me how to solve this, but don’t give me the answer, i want to try by myself

Mathematics

1 answer:

OLEGan [10]2 years ago

3 0

Answer:

Step-by-step explanation:

Clue 1 :

"Percent of Decrease" = ( Final Number - Initial Number ) expressed as a percentage of the Initial Number

Clue 2 :

number X expressed as a percentage of Number Y = (X/Y) x 100 %

Good luck!

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An account is opened with an initial balance of $950 and a simple annual interest rate of 1.6%. What is the balance after 5 year

Sergeeva-Olga [200]

The answer is $1,026.

Solving: Use Simple interest formula, I=Prt.

Make the rate into a decimal (1.6% -> 0.016)

plug in the numbers into the formula. 950 x 0.016 x 5 = 76$.

76$ will be our interest, now to find the balance we would have to add the the starting money (950) with our interest (76$), resulting in our answer of $1,026 after 5 years.

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1 year ago

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Derive the equation of the parabola with a focus at (_5, 5) and a directrix of y = -1.

mars1129 [50]

Answer: Option D is correct.

Step-by-step explanation:

Since we have given that

focus = (-5,5)

and a directrix y= -1

Since, equation of parabola in this case will be

$(x-h)^2=4.a(y-k)$

Now, here

$y=k-a=-1\\\\\text { focus =(h,k+a)}\\\\\text{So,} k+a=5\\\\\text{ by solving these two equation , we get }\\\\a=3\text{ and } k=2$

So equation will be

$(x+5)^2=4\times 3(y-2)\\\\(x+5)^2=12(y-3)\\\\y=\frac{1}{12}(x+5)^2+2$

So, option D is correct .

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2 years ago

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Sayuri's Asian Café makes the best pot stickers in town. The kitchen's production is usually between 20 and 22 pot stickers per

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The answer is day 6 because the kitchen s production is now 50 pot stickers per hour.So it went up , which makes a good/positive impact on production.

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3 years ago

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If CB =3(x+8) and AD= 4(x+3), find AB

kkurt [141]

CD=CA+AB+BD

AB=CD-CA-BD

AB=CD-BD-BD

AB=CD-2.BD

AB=CD-2(BC+CD)

AB=CD-2BC-2CD

AB=-(CD+2BC)

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AB= 6x-50

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2 years ago

An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probability that there is at le

hoa [83]

Answer:

0.999

Step-by-step explanation:

At least 1 correct means, 1 correct, 2 correct, 3 correct ... until 10 correct. That would be a long process to calculate.

Instead we use the complement rule to calculate.

$P(x\geq1)=1-P(x$

So we need to find P(x<1). So this is getting 0 answers correct, or 10 incorrect.

In true false question, probablity of correct is 1/2 and incorrect is 1/2, hence,

Probability of 10 incorrect is (1/2)^10

Thus,

$P(x\geq1)=1-(\frac{1}{2})^{10}=0.999$

So the answer is 0.999 (rounded to nearest thousandth)

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2 years ago