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frez [133]
3 years ago
5

Traffic police measure the speed of the incoming vehicles. The speeds are normally distributed with a mean of 70 km/hr and a sta

ndard deviation of 10 km/hr. What percentage of vehicles would-be travelling at random has a speed less than 80 Km/hr?
Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
6 0

Answer:

Ayayai Company has an old factory machine that cost $63,000. The machine has accumulated depreciation of $35,280. Ayayai has decided to sell the machine. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts.)

Step-by-step explanation:

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The length of the guy why supporting a cell tower is 120 m the guy wire is anchored to the ground at a distance of 80 m from the
Katarina [22]

Complete Question

The length of the guy wire supporting a cell tower is 120 m. The guy wire is anchored to the ground at a distance of 80 m from the base of the tower to the nearest hundredth of a meter how tall is the tower?

Answer:

89.44m

Step-by-step explanation:

We solve this question using the Pythagoras Theorem

This is given as:

Hypotenuse² = Opposite ² + Adjacent ²

Hypotenuse = Length of the guy wire = 120m

Adjacent = Distance from the base of the tower = 80m

Opposite = Height of the building = x

Hence:

120² = x² + 80²

Collect like terms

x² = 120² - 80²

x = √120² - 80²

x = √(8000)

x = 89.4427191 m

Approximately the height of the tower is = 89.44m

6 0
3 years ago
Emily went to the movie theatre for her birthday. A mix of adults and children attended, making a total of 19 people. Each adult
konstantin123 [22]

Answer:

13 Adults and 6 Kids

Step-by-step explanation:

13*9 = $117

6*5.5 = $33

$117 + $33 = $150

8 0
3 years ago
using the distributive property to find the product (y-4)(y^2+4y+16) results in a polynomial of the form y^3 + 4y^2 + ay - 4y^2
Anni [7]
(y-4)(y^2+4y+16)
y^3+4y^2+16y-4y^2-16y-64=y^3+4y^2+ay-4y^2-ay-64
Comparing the coefficients: a=16
Answer: The value of a in the polynomial is 16
7 0
3 years ago
Read 2 more answers
Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
sineoko [7]

Answer:

The value of x =2 and y= 2, because they are congruent and 2+2=4

3 0
2 years ago
Read 2 more answers
What is the value of x?<br><br><br><br> Enter your answer in the box.
hichkok12 [17]

Answer:

x = 25

Step-by-step explanation:

<em>Step 1: Identify the similar triangles</em>

Triangle DQC and triangle DBR are similar

<em>Step 2: Identify the parallel lines</em>

QC is parallel to BR

<em>Step 3: Find x</em>

DQ/QB = DC/CR

40/24 = x/15

x = 25

!!

8 0
3 years ago
Read 2 more answers
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