Answer:
- Mean score=120
Step-by-step explanation:
- Areas of a triangle add upto 180degrees (63+78+x=180) 141+x= (x=180-141) x=39
- Areas on a straight line add upto 180degrees
180-78=102
180-63=117
180-39=141
- 102+117+141=360
- Mean=360/3 =120
A 15-g sample of radioactive iodine decays in such a way that the mass remaining after t days is given by
1 answer:
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1: 10x-5
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3: 15+3n
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