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3 years ago

Can someone help me with this??

Mathematics

1 answer:

vesna_86 [32]3 years ago

8 0

It would be 45. He has 300, and the interest rate is 5%. 5% of 300 is 15. and he earns that 5% once per annum (which is once per year) so 15 dollars of interest a year for 3 years is 45 earned in interest.

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How much would you pay for a $135 chair that is marked up 65%?

Nimfa-mama [501]

135 x 0.65 =87.75
so the answer
should be
87.75

5 0

3 years ago

Two boats leave port at noon. Boat 1 sails due east at 12 knots. Boat 2 sails due south at 8 knots. At 2 pm the wind diminishes

Ivan

Answer:

14.86 knots.

Step-by-step explanation:

<em>Given that:</em>

The boats leave the port at noon.

Speed of boat 1 = 12 knots due east

Speed of boat 2 = 8 knots due south

At 2 pm:

Distance traveled by boat 1 = 24 units due east

Distance traveled by boat 2 = 16 units due south

Now, speed of boat 1 changes to 9 knots:

At 3 pm:

Distance traveled by boat 1 = 24 + 9= 33 units due east

Distance traveled by boat 2 = 16+8 = 24 units due south

Now, speed of boat 1 changes to 8+7 = 15 knots

At 5 pm:

Distance traveled by boat 1 = 33 + 2 $\times$ 9= 51 units due east

Distance traveled by boat 2 = 24 + 2 $\times$ 15 = 54 units due south

Now, the situation of distance traveled can be seen by the attached right angled $\triangle AOB$ .

O is the port and A is the location of boat 1

B is the location of boat 2.

Using pythagorean theorem:

$\text{Hypotenuse}^{2} = \text{Base}^{2} + \text{Perpendicular}^{2}\\\Rightarrow AB^{2} = OA^{2} + OB^{2}\\\Rightarrow AB^{2} = 51^{2} + 54^{2}\\\Rightarrow AB^{2} = 2601+ 2916 = 5517\\\Rightarrow AB = 74.28\ units$

so, the total distance between the two boats is 74.28 units.

Change in distance per hour = $\dfrac{Total\ distance}{Total\ time}$

$\Rightarrow \dfrac{74.28}{5} = 14.86\ knots$

6 0

3 years ago

Find the root(s) of the equation x^2=100

Akimi4 [234]

Answer:

x=10,−10

simple, it could be negative OR positive :D

5 0

3 years ago

Find the Mean, Median and mode

krek1111 [17]

12, 16 18, 24, 28, 31, 32, 32, 32

Mode: 32

Mean: 12 + 16 + 18 + 24 + 28 + 31 + 32 + 32 + 32 = 225 ÷ 9 = 25

Mean: 25

Median: 28

7 0

3 years ago

What is 11/4 times 7/4

AysviL [449]

.:|:. Answer .:|:.

4 13/16

.:|:. Explanation .:|:.

11 / 4 * 7 / 4

11 * 7

4 * 4

77 / 16

Simplify:

4 13/16

<> Eclipsed <>

4 0

3 years ago