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3 years ago

15

Needs Quick A pack of cinnamon-scented pencils sells for $4.00. What is the sales tax rate if the total cost of the pencils is

$4.28?

2 answers:

Contact [7]3 years ago

6 0

Answer:

8.28

Step-by-step explanation:

add 4.00 and 4.28

Colt1911 [192]3 years ago

4 0

Answer:

no idea sorry

Step-by-step explanation:

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The graph of function f a shown. Use the zeros and the turning points of the graph to find the rule for f.

Allisa [31]

Answer:

f(x) = x(x +4)(x -3)

Step-by-step explanation:

Zeros at -4, 0, and 3 tell you the factorization is ...

f(x) = a(x +4)(x)(x -3)

Then f(2) = a(6)(2)(-1) = -12a.

The graph shows f(2) = -12, so a=1. That makes the function rule:

f(x) = x(x +4)(x -3)

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If you want it multiplied out, it will be

f(x) = x^3 +x^2 -12x

8 0

3 years ago

باستعمال log4 2=0.5 فإن قيمة log4 32 هي

11Alexandr11 [23.1K]

Answer:

$\mathbf{\log_432}=2.5$

Step-by-step explanation:

$\log_42=0.5$

حن بحاجة إلى إيجاد $\log_432$

دع $\log_432=x$

$\log_42\times 2\times 2\times 2\times 2=x$

$\Rightarrow x=\log_42^5$

$\Rightarrow x=5\log_42$ $[\because \log_ab^x=x\log_ab]$

$\Rightarrow x=5\times0.5$

$\Rightarrow x=2.5$

$\mathbf{\therefore\log_432=2.5}$

7 0

2 years ago

A baseball diamond is a square with side 90 ft. A batter hits the ball and runs toward first base with a speed of 31 ft/s. (a) A

Afina-wow [57]

Answer:

13.86 ft/sec

Step-by-step explanation:

If we let x = distance batter has run at time t and D = distance from second base to the batter at time t, then we know $\frac{dx}{dt}=31 ft/s$ and we want $\frac{dD}{dt}$ when he is halfway (at x = 45).

Using Pythagoras theorem

$D^2=90^2+(90-x)^2\\\text{Differentiating with respect to t}\\2D\frac{dD}{dt}=0+2(90-x)(-1)\frac{dx}{dt}\\2D\frac{dD}{dt}=-2(90-x)\frac{dx}{dt}$

When x=45

$D^2=90^2+(90-x)^2\\D^2=90^2+(90-45)^2\\D^2=10125\\D=\sqrt{10125}$

$2D\frac{dD}{dt}=-2(90-x)\frac{dx}{dt}\\2\sqrt{10125}\frac{dD}{dt}=-2(90-45)(31)\\\frac{dD}{dt}=\frac{-2(45)(31)}{2\sqrt{10125}} =-13.86ft/s$

Thus, when the batter is halfway to first base, the distance between second base and the batter is decreasing at the rate of about 13.86 ft/sec.

4 0

3 years ago

Which of these is the algebraic expression for "some number to the power of 6?"

Verizon [17]

Your answer is C. x6

4 0

2 years ago

Read 2 more answers

Translate the sentence into an equation Twice the difference of a number and 9 is equal to 5use the variable w for the unknown n

TEA [102]

Let w the unknown number. Then, you have

$\begin{gathered} 2(w-9)\rightarrow\text{ Twice the difference of a number and 9} \\ 2(w-9)=5\rightarrow\text{Twice the difference of a number and 9 is equal to 5} \end{gathered}$

3 0

1 year ago