Answer:
(C)4
Step-by-step explanation:
Given the line: 
The gradient of the line, 
A line perpendicular to the given line will have a gradient, 
(by definition of perpendicularity).
Therefore, a perpendicular line that passes through the point (4,1) is:
Comparing with the slope-intercept form y=mx+x, the slope of the perpendicular line, b=4.
9.
9 squared is 81. 81+4=85. 85 is divisible by 5.
Answer:
b is the answer
Step-by-step explanation:
Answer:
2.5mg
Step-by-step explanation:
Since the half-life for the radioactive material is 3 hours, Therefore it will undergone two times of half-life process.
The first 3 hours 10mg will be decreased into 5mg. The final 3 hrs, it will decreased from 5mg to 2.5mg
Area = length × width
Joseph: 12 × 9 = 108 feet
Alana: 25 × 7 = 175 feet
175 feet - 108 feet = 67 feet
Answer: Alana's garden is greater by 67 feet compared to Joseph's
