A random bulb from a batch of light bulbs has the probability D(t) = 1 − e−rt of failing before t

hours. If the mean lifetime of such bulbs is 1000 hours, what is the value of r?

hours. If the mean lifetime of such bulbs is 1000 hours, what is the value of r?

### Recently Asked Questions

- What address does the HCS12 use to find the address of an interrupt service routine for a timer overflow

- I have no clue lol. If the hydrogen ion (H+) [or the hydronium ion (H3O+)] and the hydroxide ion (OH-) react together what is the product of the reaction?

- Please refer to the attachment to answer this question. This question was created from 398e0e0cd51ddcfc8c28181417aea4c6_f822b88828eeda7b9118d144c41959f8.docx.