Respuesta :
Answer:
His average for 4 days is 2542.5 mg
Intake of 5th day has to be less than 1330 mg
Explanation:
In order to find the average we take the sum of intakes for 4 day ans then divide it by total number of day which is 4 days.
Average = (2150 + 3005 + 2700 + 2315) / 4
Average = 10170/4
Average = 2542.5 mg
To find the 5th day intake such that average is below 2300 mg:
Let 5th day intake = x
We apply the same method to find the average by taking the sum of intakes for 5 days and then dividing the total with 5 days now. This average has to be less than 2300 mg therefore we use the following method:
(2150 + 3005 + 2700 + 2315 + x ) / 5 < 2300
2300 = (10170 + x)/ 5 < 2300
10170 + x < 11500
x < 11500 - 10170
x < 1330 mg
Answer:
A. average = 2542.5mg
B. The 5th day intake should be less than 1330mg
Explanation:
Given the daily intake to be : 3005, 2700, 2315, 2150
Average =( 3005+ 2700+ 2315 + 2150)/4
Average = 10170/4
= 2542.5 mg
Let the 5th day intake be X
(X + 10,170)/5 <2300
X + 10,170 <5(2300)
X< 11,500 - 10,170
X < 1330mg