If t₀ is the initial temperature of the metal then after time t hours the temperature will be t₀-5t, which must not go below -75℃.
So t₀-5t≥-75.
Answer:0.025+0.17=0.195
Step-by-step explanation:
0.025
<u>+0.170</u>
0.195
461.81 is the correct answer
There are 12 marbles in total in the bowl.
From this bowl, we will choose 4 marbles at random.
That's 12C4 or (12*11*10*9) or 11,880 ways
Out of this, what is the probability that there is exactly 1 blue marble.
There are 5 blue balls but only 1 is selected, 5C1 ways
The rest except blue calls are 7, but only 3 slots are left, 7C3 ways
The probably of exactly 1 blue of 4 marbles is then 5C1*7C3/12C4 = 1050/11,880 = 0.0884 or 8.84%