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Nonamiya [84]
3 years ago
5

A student’s rectangular desk is 30 inches long and 18 inches wide. The teacher’s desk is similar to the student’s desk and has a

length of 50 inches. What is the width of the teacher’s desk?
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
3 0
30*18=540. 
Both of the tables are 540 square inches
540/50=10.8
The width is 10.8 inches
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Help show the work for <br> 5.2 divide by 0.13
aivan3 [116]

Answer:

40

Step-by-step explanation:

0.13 ⟌5.2 (We can move 0.13 over two spots)

13⟌520 (We move the decimal two spots because of previous)

We have

    ₄ ₀

13⟌520

  - 52

______

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So 40 is our final answer.

4 0
4 years ago
A detective finds a victim of murder at 9 am. At that time, the temperature of the body is 90.3 degrees F. One hour later, the b
LekaFEV [45]

Answer:

Step-by-step explanation:

Given

at 9 am temperature of the body is 90.3^{\circ}F

1 hr later temperature 89^{\circ}F

Temperature of room T=68^{\circ}F

According to newtons law

\frac{\mathrm{d} T}{\mathrm{d} t}=-k\left ( T-T_{room}\right )

\frac{\mathrm{d} T}{\mathrm{d} t}=-k\left ( T-68\right )

\frac{dT}{T-68}=-kdt

Integrating

=\int \frac{dT}{T-68}=-kdt

\ln |T-68|=-kt+c

T-68=Ae^{-kt}

Now at 9 am i.e. t=0,

90.3=A+68

A=22.3

At 10 am i.e. t=1 hr T=89

89-68=22.3e^{-k}

e^{-k}=21

k=0.06006

Temperature of Normal human body is T=98.6 ^{\circ}F

98.6-68=e^{-0.06006t}

30.6=e^{-0.06006t}

Taking log both sides

t=-5.27

i.e. 5 hr and  16.2 min

i.e. victim murdered at 3 am and 43.8 min

7 0
3 years ago
Explain how to use patterns or sequences to determine the last digit of the number 7N, where N is the four-digit year of your bi
maria [59]
Ahh this is a good hard question, hopefully someone comes along and helps you out with it. Goodluck my friend!
7 0
3 years ago
A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77.
natita [175]

Answer:

Because the total is 49.77 and the total is the bill + tip, then the tip is 49.77 - 42 or $7.77. To find the percentage, we just calculate 7.77/42 as a percentage to get 1.11/6 = (111/6)% or 37/2 percent or 18.5%

3 0
3 years ago
What is the total price of a $60 restaurant tab if you leave a 15% tip?
7nadin3 [17]

Answer:

$69 is the total cost of the bill

Step-by-step explanation:

60(1.15)

60 is the cost of the bill, and the 1.15 is the added tax plus the previous $60.

Put 60(1.15) into a calculator and

$69

8 0
3 years ago
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