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Paul [167]
3 years ago
12

Help please thank you

Mathematics
1 answer:
dimulka [17.4K]3 years ago
7 0

Answer:

i think its 8r^4

hope this helps

Step-by-step explanation:

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A staircase is being constructed in a new house as displayed on the right. Each tread is 18 cm and each riser is 10cm. Determine
Verdich [7]

Answer:

29.1°

Step-by-step explanation:

Given that :

Riser, AB, Opposite = 10 cm

Thread, = AC, Adjacent = 18 cm

Angle of inclination, θ

Using trigonometry :

Tan θ = opposite / Adjacent = AB / AC

Tan θ = 10 / 18

θ = tan^-1(10/18)

θ = 29.055

Hence, angle of inclination is 29.1° (1 decimal place)

6 0
3 years ago
Which of the following is an equivalent representation of 5^-4 ?<br> 1/81<br> 1/12<br> 1/9<br> 1/625
Mademuasel [1]

Answer:

It would be 1/625

Step-by-step explanation:

5^-4=0.0016

0.0016 as a fraction is 1/625

Hope this helps! :)

3 0
3 years ago
Which number is closest to - 102 (square root)?<br> A. -11.5<br> B. -10.0<br> C. -9.7<br> D. -11.1
andre [41]

Answer:

B. -10.0

Step-by-step explanation:

-10.0² = -100

thus= -10.0 is the closest to -102 (square root)

3 0
3 years ago
Read 2 more answers
Need help antoine leaves his house walking at a speed of 15 meters per minute. his brother walks behind 30 minutes later at a sp
Studentka2010 [4]
I believe that once Antoine has been walking for 75 minutes his brother will habe caught up, and this would mean his brother had walked for 44 minutes
6 0
3 years ago
How many sets of 7 questions can be chosen from a file of 25 questions?
likoan [24]
If all 25 questions are different,

When order of selection counts:
P(25,7)
=25!/(25-7)!
=15511210043330985984000000/6402373705728000
=2422728000

When order of selection does not count count:
C(25,7)
=25!/(7!*(25-7)!)
=15511210043330985984000000/(6402373705728000*5040)
=480700

3 0
3 years ago
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