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Natali5045456 [20]
3 years ago
9

3. Mrs. Noah’s bill, before tax, is $50. The sales tax rate is 3%. Mrs. Noah decides to leave a 2% tip for the gate keeper based

on the pre-tax amount. How much will the total bill be, including tax and tip?
Mathematics
1 answer:
Olegator [25]3 years ago
5 0

Answer:  The total bill will be $52.5

Step-by-step explanation:

Hi, to answer this question, first we have to multiply the amount of the bill before tax (50) by the sale tax rate in decimal form (divided by 100)

Mathematically speaking:

50 x (3/100) = 50 x 0.03 = $1.5 (sales tax amount)

Next, we have to multiply the amount of the bill before tax (50) by the tip percentage in decimal form:

50 x (2/100) = 50 x 0.02 = $1 (tip amount)

Finally, we have to add both amounts to the original bill:

50+1.5+1 = $52.5

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Answer:

Literally do

a^2+b^2=c^2

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3 years ago
Strontium-90 has a half-life of 28.8 years. If you start with a 300-gram sample of strontium-90,
Kazeer [188]

Answer:  2.66 × 10⁻¹³

<u>Step-by-step explanation:</u>

First, use the decay formula   A=A_oe^{kt}   where

  • A is the final amount (amount left)
  • A₀ is the initial amount (amount you started with)
  • k is the rate of decay (you need to solve for this)
  • t is the time

Given:

  • A = 1/2(300) = 150
  • A₀ = 300
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150=300e^{28.8k}\\\\0.5=e^{28.8k}\\\\ln(0.5)=ln(e^{28.8k})\\\\ln(0.5)=28.8k\\\\\\\dfrac{ln(0.5)}{28.8}=k\\\\\\\large\boxed{-0.0240676=k}\\

Next, input the k-value and the new t-value to solve for A.

  • A = unknown
  • A₀ = 300
  • k = -0.0240676
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A=300e^{1440(-.0240676)}\\\\\large\boxed{A=2.66\times 10^{-13}}\\

5 0
3 years ago
The equation d=3t represents the relationship between the distance (d) in inches that a snail is from a certain rock and the tim
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Answer:

Speed

Step-by-step explanation:

To find the distance the formula is d=st. Where d is the distance, s is speed, and t is time. So in the equation, 3 must be the speed of the snail.

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Read 2 more answers
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vlada-n [284]

Answer:

So the answer is 108.75

Step-by-step explanation:

15 * $4.25 = 63.75

12*  $3.75 = 45

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Answer:108.75

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The radius of a cone is 5cm the heigth of the cone is 18 cm what is the volume of the cone
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6-8 cm is the answer!! Hope this helps!
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