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2 years ago

5

Alice and Shivani went to lunch at a cafe. They ordered a spinach salad for $5.75, a tuna sandwich for $7.20, and 2 glasses of l

emonade for $1.30 each. The tax was $1.55. They gave the waiter $20.00. How much change should they have received?

1 answer:

Vikki [24]2 years ago

3 0

Answer:

$2.90

Step-by-step explanation:

Spinach $5.75

Tuna $7.20

2 lemonades $2.60

tax = $1.55

Sum = $17.10

Change = $20.00 - $17.10 = $2.90

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Solve using the box method

Lena [83]

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3 years ago

The radius of a right circular cone is increasing at a rate of 1.5 in/s while its height is decreasing at a rate of 2.1 in/s. At

givi [52]

Answer:

The volume of the cone is changing at a rate of approximately 8670.796 cubic inches per second.

Step-by-step explanation:

Geometrically speaking, the volume of the right circular cone ( $V$ ), in cubic inches, is defined by the following formula:

$V = \frac{1}{3}\cdot \pi \cdot r^{2}\cdot h$ (1)

Where:

$r$ - Radius, in inches.

$h$ - Height, in inches.

Then, we derive an expression for the rate of change of the volume ( $\dot V$ ), in cubic inches per second, by derivatives:

$\dot V = \frac{1}{3}\cdot \pi \cdot (2\cdot r\cdot h \cdot \dot r + r^{2}\cdot \dot h)$ (2)

Where:

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$\dot h$ - Rate of change of the height, in inches per second.

If we know that $r = 120\,in$ , $\dot r = 1.5\,\frac{in}{s}$ , $h = 107\,in$ and $\dot h = -2.1\,\frac{in}{s}$ , then the rate of change of the volume is:

$\dot V \approx 8670.796\,\frac{in^{3}}{s}$

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3 years ago

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Likurg_2 [28]

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3 years ago

Groundhog Day Puzzle

avanturin [10]

Answer:

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I hope this helped! This was a challenging puzzle! I hope you have a nice day! (If it is possible can you give me a brainliest? I would really appreciate if you did!)

Sincerely,

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3 years ago

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MaRussiya [10]

Answer:

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Step-by-step explanation:

Therefore our proportion is: (where x is the "vertical" rise)

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3 years ago