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3 years ago

14

What is the total cost for $55.80 with the sales tax of 2.7%?

2 answers:

nevsk [136]3 years ago

8 0

It should be $57.30. I use a calculator for school but you just add 2.7% to 55.80 to find the answer.

kifflom [539]3 years ago

3 0

2.7 x 10= 0.27

SALES TAX:
0.27% of 55.80
0.27 x 55.80
=$15.06 (15.006)

TOTAL COST:
$15.06 + $55.80
=$70.86

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FREE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY!! (I CAN TELL I YOU LIE)

enyata [817]

Answer:

Ermmm, theres no table/graph so maybe try repostin?

Step-by-step explanation:

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3 years ago

A hiker is hiking in a valley. The height of the valley is h(x,y)=4x2+y2 where x and y are the east-west and north-south distanc

Ainat [17]

Answer:

A. $\frac{\partial{h}}{\partial{t}}=0$

Step-by-step explanation:

A. The problems asked for 2 ways to solve it, expanding the equation with the substitution x(t)=2 cos(t) and y(t)=4 sin(t) to differentiate it . The other way is by chain rule.

Expanding and differentiating:

We start by substituting x(t)=2 cos(t) and y(t)=4 sin(t) in h(x,y)=4x2+y2:

$h(x,y)=4x^{2}+y^{2}= 4(2cos(t))^{2}+(4sin(t))^{2}\\h(x,y)=4(4cos^{2}(t))+(16sen^{2}(t))\\h(x,y)=16cos^{2}(t)+16sen^{2}(t)=16(sen^{2}(t)+cos^{2}(t))\\h(x,y)=16$

So, in the path that the hiker chose:

$\frac{\partial{h}}{\partial{t}}=0$

Chain rule:

We start differentiating h(x,y) using chain rule as follows:

$\frac{\partial{h}}{\partial{t}}= \frac{\partial{h}}{\partial{x}}\frac{\partial{x}}{\partial{t}}+\frac{\partial{h}}{\partial{y}}\frac{\partial{y}}{\partial{t}}$

Now, it´s easy to find all these derivatives:

$\frac{\partial{h}}{\partial{x}}=8x\\\frac{\partial{x}}{\partial{t}}=-2sin(t)\\\frac{\partial{h}}{\partial{y}}=2y\\\frac{\partial{y}}{\partial{t}}=4cos(t)$

Now we replace them in the chain rule, with the replacement x=2cos(t) and y=4sin(t) in the x,y that are left and we operate everything:

$\frac{\partial{h}}{\partial{t}}= 8x(-2sin(t))+2y(4cos(t)$

$\frac{\partial{h}}{\partial{t}}= 8(2cos(t))(-2sin(t))+2(4sin(t))(4cos(t)$

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3 years ago

roberto made a 74 on last weeks math quiz. this week he made an 85 on the quiz. which best describes the percent of increase in

laila [671]

The percentage of increase in Roberto score is 14.87%, if Roberto made a 74 on last weeks math quiz. this week he made an 85 on the quiz.

Step-by-step explanation:

The given is,

Roberto score on math quiz at last week is 74

This week he made an 85 on the quiz

Step:1

Formula to calculate the percentage of increase the score,

$Percentage of increase = \frac{Final score-Starting score}{Starting score}$ × 100...........(1)

From the given,

Final score = 85

Starting score = 74

Equation (1) becomes,

$Percentage of increase =( \frac{85-74}{74})$ × 100

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= 0.1486486 × 100

= 14.86486 %

≅ 14.87 %

Percentage of increase = 14.87 %

Result:

The percentage of increase in Roberto score is 14.87%, if Roberto made a 74 on last weeks math quiz. this week he made an 85 on the quiz.

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3 years ago

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Xelga [282]

Answer:

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We are given that,

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i.e. adqu ≅ teki

Now, when two figures are congruent the position of the letters are very important.

Using the positioning of the letters, we will find the quadrilateral congruent to ' quad '.

So, we see that the correspondence of letters is given by q → k, u → i, a → t and d → e.

Therefore, quad ≅ kite.

Hence, Quadrilateral ' quad ' is congruent to quadrilateral ' kite '.

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3 years ago