To calculate the number of jellybeans in a jar, count the number of jellybeans on the top layer of the jar. Then, count the number of jellybeans going down the side of the jar, and multiply that number by the number of jellybeans in the top layer to get an estimate of the number of jellybeans in the jar.Know More
Another way to estimate the number of jellybeans in a jar is to make a guess based on the volume of the jar. There are approximately 930 jellybeans in a gallon. Look at the jar to estimate its volume, and make a guess accordingly. For instance, if the jar is about the size of a quart, there would be approximately 233 jellybeans in the jar. This is because a quart is 1/4 gallon, and 930 jellybeans divided by four is roughly 233.
Jellybeans can be irregularly shaped, and therefore, they may not fill the jar tightly. Rather, there may be air holes or gaps in the jar. If estimating the number of jellybeans in a jar based on the estimated volume of the jar, it is best to multiply the estimate by 80 percent. That leaves a 20 percent margin of error for empty space in the jar.Learn more about Statistics
To calculate moles, begin by identifying the number of grams of the substance, and calculate its molar mass. Divide the number of grams by the molar mass of the compound to make the conversion to moles.Full Answer >
To calculate wave frequency in physics, one must know about the variables used in different formulas. One formula states that frequency (f) is equal to the wave velocity (v) divided by the wavelength (λ), or f = v/ (λ). If you know the period (T), another formula you can use is that frequency is the reciprocal of the period, or f= 1/T.Full Answer >
Because different assignments require different amounts of effort and are valued differently, it is important for teachers to give larger assignments more weight in the grade book. To calculate weighted grades, teachers and their students must know the comparative values of the different assignments and how the points are assigned.Full Answer >
Calculate the weighted average of a data set using the formula w1x1 + w2x2 + … wnxn. It involves multiplying each number by its weight and then summing up their products. You need the data values, or x, and the data value's weights, or w.Full Answer >