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Katen [24]
3 years ago
9

Madison arrived at work at 8:00 AM. She went out for lunch at 11:00 AM. She returned at 12:00 PM and worked until 4:00 PM. How m

any hours and minutes did she work?
A- 4 hours, 0 minutes

B- 6 hours, 0 minutes

C- 7 hours, 0 minutes

D- 8 hours, 0 minutes
Mathematics
2 answers:
goblinko [34]3 years ago
8 0
C-7 hours, 0 minutes because between 8 and 11 are 3 hours and between 12 and 4 are 4 hours. 3+4= 7 hours
NARA [144]3 years ago
7 0

8.00 until 11.00 am = 3 hours

12.00 until 4 pm  = 4 hours

Answer is D

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This parabola has<br> x-intercepts
slega [8]

Answer:

see the explanation

Step-by-step explanation:

we have the quadratic equation

y=-16x^{2} +32x-10

This is a vertical parabola open downward

The vertex is a maximum

Find the x-intercepts of the quadratic equation

The x-intercepts are the values of x when the value of y is equal to zero

so

For y=0

-16x^{2} +32x-10=0

Solve the quadratic equation

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-16x^{2} +32x-10=0        

so

a=-16\\b=32\\c=-10

substitute in the formula

x=\frac{-32(+/-)\sqrt{32^{2}-4(-16)(-10)}} {2(-16)}

x=\frac{-32(+/-)\sqrt{384}} {-32}

x=\frac{-32(+/-)8\sqrt{6}}{-32}

x=\frac{-32(+)8\sqrt{6}}{-32}=\frac{32(-)8\sqrt{6}}{32}=0.39\ sec

x=\frac{-32(-)8\sqrt{6}}{-32}=\frac{32(+)8\sqrt{6}}{32}=1.61\ sec

therefore

This parabola has two x-intercepts representing the times when the dolphin's height above water is zero feet

8 0
3 years ago
Read 2 more answers
4a − 3 = 9 + a..........................
OverLord2011 [107]

Answer:

4a - 3 = 9 + a \\ 4a  - a = 9 + 3 \\ 3a = 12 \\ a  = \frac{ 12}{3}  \\ a = 4

I hope this help

7 0
3 years ago
Order the values from smallest (top) to largest (bottom) 1. 5 2/3 2. 5 1/6 3. 4 5/6 4. 4 1/2 5. 4 1/3 6. 5 6/6
Ulleksa [173]
4 1/3, 4 1/2, 4 5/6, 5 1/6, 5 2/3, 5 6/6
6 0
2 years ago
I don’t understand this can someone please please help!!!!!!!!!!
AnnyKZ [126]

Answer:

172 ft 2

Step-by-step explanation:

SA=2lw+2lh+2hw, for

A=2(lw + lh + hw)=2·(7 · 2+ 8 · 2 + 8 · 7)= 172 ft 2.

Hope this helps,

Best of Luck!

8 0
3 years ago
Jane wishes to bake an apple pie for dessert. The baking instructions say that she should bake the pie in an oven at a constant
pychu [463]

Answer:

A=152

K= -Ln(0.5)/14

Step-by-step explanation:

You can obtain two equations with the given information:

T(14 minutes) = 114◦C

T(28 minutes)=152◦C

Therefore, you have to replace t=14, T=114 and t=28, T=152 in the given equation:

114=190-Ae^{-14k} (I) \\152=190-Ae^{-28k}(II)

Applying the following property of exponentials numbers in (II):

e^{a}.e^{b}=e^{a+b}

Therefore e^{-28k} can be written as e^{-14k}.e^{-14k}

152=190-Ae^{-14k}.e^{14k}

Replacing (I) in the previous equation:

152=190-76e^{-14k}

Solving for k:

Subtracting 190 both sides, dividing by -76:

0.5=e^{-14k}

Applying the base e logarithm both sides:

Ln(0.5)= -14k

Dividing by -14:

k= -Ln(0.5)/14

Replacing k in (I) and solving for A:

Ae^{-14(-Ln(0.5)/14)}=76\\Ae^{Ln(0.5)} =76\\A(0.5)=76

Dividing by 0.5

A=152

7 0
3 years ago
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