An estimate, which can be obtained quickly, can sometimes be sufficient for the immediate purpose. It may be better than an exact answer which will take time.
When you wish to compare is to another number.
give me examples of estimate
Contact the manufacturer for an estimate if you are trying to figure depreciation over useful life.
yes....it would be very useful
It's useful when you can't give an accurate figure to something.
Initially, depreciation for financial reporting purposes is based on an owner's estimate of the useful life of the asset in service. If later, the owner has better or additional information about the true useful life of the asset, he can revise his estimate of its useful life and take all remaining depreciation (on a going-forward basis) based on the asset's revised remaining useful life.
The microscope that is more useful to estimate red blood cells is an electron microscope because it can magnify to see cells that other microscopes can't see such as the light microscope
You would use "a" before "useful" when it is followed by a consonant sound. For example, "a useful tool." You would use "an" before "useful" when it is followed by a vowel sound. For example, "an useful addition."
singing would be useful in the future to entertain people
In WWII an airplane would be useful to bomb the other countries.
To estimate numbers more easily.
it would be useful because they can see how the tide is going to be.