Answer:
She uses 243 beads for the 5th string.
Step-by-step explanation:
In this problem, we can see a pattern. If she triples the number of beads in each of the next strings, that means that we just take the last number and multiply by 3. If the first string uses 3, then:
The second uses 9, 3 * 3 = 9
The third uses 27, 9 * 3 = 27
The fourth uses 81, 27 * 3 = 81
And the 5th uses 243, 81 * 3 = 243.
We know





Now
- New Radius=2(4)=8cm
- New Height=2(8)=16cm




So



Hence our correct option is Option C
Question 9:
cos x = 10/36
Take the inverse on both sides.
arccos(cos x) = arccos(10/36)
x = 73.8723797868
x = 73.87
Question 10:
tan 89 = x
57.2899616308 = x
57.29
Is 16 an option because if it is then... it's right?
Answer:
uniform for 1 student = 1 1/8 = 9/8
uniform 32 students = 32 x 9/8 = 36m
Total cloth = 45 3/4 = 183/4 = 45.75m
Cloth left = 45.75 - 36 = 9.75m i hope that helps