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tangare [24]
3 years ago
5

A granite monument has a volume of 25,365.4 cm3. The density of granite is 2.7 g/cm3. Use this information to calculate the mass

of the monument to the nearest tenth.
Mathematics
2 answers:
Sladkaya [172]3 years ago
8 0
Let units cancel out just like numbers...

25365.4cm^3(2.7g/cm^3)=68486.58g  which is 68486.6g (to nearest tenth)
RideAnS [48]3 years ago
4 0
(2.7g/cm^3)(25365.4cm)=mass
=68486.58g
or, rounded, 68486.6grams
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Can someone please answer my question please answer it correctly please show work please I need please help
Kryger [21]

Answer:

43. 171 × $4.50 = $769.50

(171 ÷ 9) × 2 = 38

38 × $7.25 = $275.50

$769.50 + $275.50 = $1,045.00

$1,045.00 × 1.04 = $1,086.80

Answer: $1,086.80 for museum tickets and parking

171 + 38 = 209

209 × $6.00 = $1,254.00

$1,086.80 + $1,254.00 = $2,340.80

Answer: $2,340.80 for the total budget

44. Equation: 2a + 10 = 70

2a + 10 = 70 (subtract 10 from each side)

2a = 60 (divide each side by two)

a = 30

Answer: 30 envelopes

45. Inequality: $2.20x + $2.40 < $9.00

$2.20x + $2.40 < $9.00 (subtract $2.40)

$2.20x < $6.60 (divide by $2.20)

x < 3

Answer: x < 3

46. 3 inches in 4 minutes

3 ÷ 4 = 0.75

Answer: 0.75 inch(es) per minute

The only time Landon's elevation changed was from minutes 4 - 10 and 14 - 18. We know that Landon's elevation changed the fastest between minutes 14 - 18, because this occurred over the shortest period of time.

4 0
3 years ago
Plz help ill give u brainlist
serg [7]
Area of the base = 6 (1/2 x 4.3 x 5) = 64.5cm

Area of the top = area of the base = 64.5cm

Area of the 6 side rectangles = 6 x 5 x 11 = 330 cm

Total surface area = 64.5 + 64. 5+ 330 = 459 cm²

------------------------------------------------------------------------
Answer: Total surface area = 459 cm²
------------------------------------------------------------------------
5 0
3 years ago
A class has an equal number of boys and girls. The boys all got 78% on a test and the girls all got 84%. What are the mean and s
Sergio039 [100]

Answer:

Mean is 81%

standard deviation is approximately 4.2%

Step-by-step explanation:

Since the number of boys equals the number of girls, but it is not given, we name it "N". and proceed to calculate the mean as:

Mean = (0.78 * N + 0.84 * N) /(2 N)

using that the total number of students must be N boys + N girls = 2 N

Then the Mean becomes: N *(0.78 + 0.84) /(2 N) = (0.78 + 0.84) / 2 = 1.62 / 2 = 0.81

So the mean is 81%

Now, standard deviation will be calculated by first adding the squares of the deviations: (X-0.81)^2 for the N boys and for the N girls, and then finding the square root of this and finally dividing by the square root of N. That is:

N\,(0.78-0.81)^2\,+\,N\,(0.84-0.81)^2= N \left \{ (-0.03)^2+(0/03)^2\right \}=N\,*0.0018

Now finding the square root of this value, and finally dividing it by the square root of N:

\sigma=\frac{\sqrt{N\,*\,0.0018} }{\sqrt{N} } =\sqrt{0.0018} \approx 0.042426

which in percent form is: approximately 4.2%

7 0
3 years ago
X+1.5 (x-3)=5/2 solve pls help me it's an immediate thing I will give 20 p for it
Yuki888 [10]
X+ 1.5x - 4.5 = 5/2
2.5x - 4.5 = 5/2
2.5x = 5/2 + 4.5
2.5x = 7
x = 7/2.5

X = 2.8
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3 years ago
Top soil is sold by the cubic yard. How much top soil, to the nearest cubic yard, is needed to create a flower bed with soil 4 f
Montano1993 [528]
You find the volume of the flower bed (4 times 25 time 6) this is 600. but you then realize that you need to convert the 6 inches into ft. so you do 25 times 4 /2 which is 50. 50/9 is rounded up to 6. Just notes: Although, when you do this, your units are in ft squared. you need to get them into yards. there are 3 feet in one yard. So, divide 600 by 9. (you need to multiply 3 times 3 to cancel out the ft squared). your answer is a
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3 years ago
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