Answer:
0.0001% probability that a randomly selected person in the United States will be struck by lightning this year
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
Desired outcomes:
304 hit by lightning, so 
Total outcomes:
300,000,000 total people, so 
Probability:
0.0001% probability that a randomly selected person in the United States will be struck by lightning this year
There's enough arithmetic involved in this that it is convenient to let a machine solver of some sort figure it out. Most graphing or scientific calculators will work this problem for you (consult the manual for yours). If you insist on doing it by hand, you must compute several average values:
• a1 = the average of sleep hours (h)
• a2 = the average of test scores (%)
• a3 = the average of the product of sleep hours and test scores (h×%)
• a4 = the average of the square of sleep hours (h×h)
a) The equation of your best-fit (least-squared-error) line is then
% = (a3 - (a1×a2))/(a4 - (a1)²)×(h - a1) + a2In numbers, this is
% = 6.33333h + 38.6875b) For h=8, the equation gives
6.33333×8 + 38.6875 ≈
89.4
The perimeter of the right angled triangle should be 36cm, hope this helps:)
Answer:
a = 3.5
Step-by-step explanation:
12a = 28 ÷ 2/3
12a = 28 × 3/2
a = 28 × 3/2 ÷ 12
a = 3.5
