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Alexus [3.1K]
3 years ago
5

The simple interest formula is A = P(1 + r)t where P represents the amount originally deposited, r is the interest rate, and A i

s the amount in the account after t years.
Find r if A = 2700, P = 2200 and t = 5.
2700 = 2200(1 + r)5
Express r as a percentage to one decimal place (x.x%).
Mathematics
1 answer:
jarptica [38.1K]3 years ago
4 0
2700 = 2220 (1 + r ) 5


5 divided by 1 = 5

2220 divided by 5 = 440

2700 divided by 440 = 6.13%
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A new road was added near Riana's neighborhood. The road is 5 miles long, and the city plans 1/10 to place a streetlight every m
elena55 [62]

Answer:

= 49  

Answer.

Step-by-step explanation:

Solution:-

Length of the road = 5 miles

Distance between every two streetlights = 1/10 miles

Total number of streetlights placed on the new road = 5 ÷ 1/10

= 5*10

= 50 streetlights

As there is already a streetlight at the beginning of the new road, so the number streetlights will be = 50 - 1

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3 years ago
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Y=x+3over 8 proportional or nonproportional
Inessa [10]

Answer:

nonproportional

Step-by-step explanation:

x + 3

------- is definitely nonproportional.  The reason for this is that the graph (a

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                                                            origin; it's offset by 3/8 unit up from the          

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6 0
2 years ago
Use properties of addition and subtraction to evaluate the expression. −24−8−26 Enter your answer in the comments below.
Sav [38]
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Can someone help please<br><br> 2y+3=3(y+7)
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Answer:

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Step-by-step explanation:

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5 0
2 years ago
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Change from rectangular to spherical coordinates. (let ≥ 0, 0 ≤ ≤ 2, and 0 ≤ ≤. ) (a) (5, 5 3 , 10 3 )
Nikolay [14]

The spherical coordinate that is converted from the given rectangular coordinate is (12.62, 46.67°, 35.3°).

Here, the given rectangular coordinate is (5, 5.3, 10.3).

Therefore, the value of 'x' is 5, the value of 'y' is 5.3 and the value of 'z' is 10.3.

We can convert the rectangular coordinate (x, y, z) into spherical coordinate (ρ, θ, Φ) by the below mentioned method.

We know, ρ² = (x²+y²+z²)

Therefore, ρ

= √(x²+y²+z²)

= √[(5)²+(5.3)²+(10.3)²]

= √(25+28.09+106.09)

= √(159.18)

= 12.62

Again, tan θ = (y/x)

Therefore, θ = tan⁻¹(y/x) = tan⁻¹(5.3/5) = tan⁻¹(1.06) = 46.67°

Similarly, cos Φ = (z/ρ)

Therefore, Φ = cos⁻¹(z/ρ) = cos⁻¹(10.3/12.62) = cos⁻¹(0.816) = 35.3°

Here, the spherical coordinate is (ρ, θ, Φ).

Therefore, the required spherical coordinate for the given rectangular coordinate is (12.62, 46.67°, 35.3°).

Learn more about the conversion of a rectangular coordinate to a spherical coordinate here: brainly.com/question/17185505

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