Hope this helps.
SOMEONE PLEASE HELP ME ASAP PLEASE!!!
2 answers:
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Answer:
a) Brain sweep out 4 radians
b) Brian is -0.3922 km to the right of the center of the ski trail
c) Brian is -0.4541 km above of the center of the ski trail
Step-by-step explanation:
Given the data in the question;
circular ski trail radius = 0.6 km
Derek starts at the 3-o'clock position and travels 2.4 km in the counter-clockwise direction.
a) How many radians does Brian sweep out?
arc length = 2.4 km
from the diagram;
arc length = rθ
θ = arc length / r
θ = 2.4 / 0.6
θ = 4 radians
Therefore, Brain sweep out 4 radians
b) When Brian stops skiing, how many km is Brian to the right of the center of the ski trail?
from the diagram;
x = rcosθ
we substitute
x = 0.6 × cos(4)
x = 0.6 × -0.65364
x = -0.3922 km
Therefore Brian is -0.3922 km to the right of the center of the ski trail
c) When Brian stops skiing, how many km is Brian above of the center of the ski trail?
from the diagram;
m = rsinθ
m = 0.6 × -0.7568
m = -0.4541 km
Therefore, Brian is -0.4541 km above of the center of the ski trail
Answer:
an exponent is the little number next to a number. it shows how many numbers of that number there are. sry thats confusing. so means 3 x 3 x 3, not the same as 3 x 3. another example:
is the same as 5 x 5 x 5 x 5.
Answer:
The student answered 18 problem correctly.
Step-by-step explanation:
We can find the number of problems answered correctly out of a test that had 30 problems by setting up equivalent fractions, or a proportion:
'x' is equal to the number of problems answered correctly. Since 60% is the number answered correctly and 100% is the total amount, we can compare 60% to 'x' and 100% to 30. In order to solve for 'x', we can cross-multiply and divide:
100x = (60)(3) or 100x = 180
Divide both sides by 100:
x = 18