Chen wants to buy a model car and race track with his allowance. He has $30 to spend. The model car costs $8.50, and he will spe
2 answers:
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Answer:
Step-by-step explanation:
From the question we are told that:
Sample size
Mean
Standard deviation
Generally 99\% confidence from table is mathematically given by
Generally the equation for 99\% confidence level (CI) is mathematically given by
Answer:
≈ 11.34 units²
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
(x + 3.5)² + (y - 2.82)² = 25 ← is in standard form
with r² = 25 ⇒ r = = 5
The area (A) of the sector is calculated as
A = area of circle × fraction of circle
= πr² ×
= π × 5² ×
= π × 25 ×
=
≈ 11.34 units² ( to the nearest hundredth )