This Question is Confusing me.
A sample of 1 kg of radioactive iodine will decay according to the following equation:
Amount remaining = 1.1^-d If d represents the number of days
How many kilograms will remain after 2 days? (Round your answer to the nearest hundredth.)
A. 0.79 kg
B. 0.83 kg
C. 0.87 kg
D. 0.92 kg
Thanks! =)
2007-02-22 03:22:16 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1 kg * 1.1^-2
=0.8264462809917355371900826446281 kg
=0.83 kg (B)
2007-02-22 03:26:00 · answer #1 · answered by math freak 3 · 0⤊ 0⤋
So you have 1.1 ^-2 = 0.826446281
rounded up is 0.83 (so answer B) my little friend !!
2007-02-22 03:26:33 · answer #2 · answered by Doctor Q 6 · 0⤊ 0⤋
Substitute 2 for d and you have
Amount remaining = 1.1^-2
The answer is B since 1.1^-2 = .82644 (it rounds up to .83)
2007-02-22 03:26:54 · answer #3 · answered by RJ 2 · 0⤊ 0⤋
Remain = (1,1)^-2=0.83 (B)
2007-02-22 03:31:37 · answer #4 · answered by santmann2002 7 · 0⤊ 0⤋