ED50V10 (Readme) is an Excel add-in for calculating IC50/EC50 values. Input your data in the left columns, and your results will be shown in the right half of the Excel table. To calculate IC50, input 50 in the "INTERPOLATE..." table (highlighted in blue), the result will be shown on the right (highlighted in green).
50-100 or so
I believe your question is to find a range going from the mean to a z-value on the standard normal distribution that corresponds to 17% of the area. A normal distribution goes from values of minus infinity to positive infinity. A standard normal distribution has a mean of 0 and an standard deviation of 1. It is usually best if you draw a diagram, in this case a bell shape curve with mean = 0. The area to the left of the mean is 50% of the total area. We find a z value that corresponds to 67% (50% + 17%) of the area to the left of this value. This can be done either with a lookup table or a spreadsheet program. I prefer excel, +norminv(0.67) = 0.44. The problem could also be worded to find the area going from a z-value to the mean. In this case, we must find a z-value that corrsponds to 33% (50-17). Using Excel, I calculate +norminv(0.33) = -0.44.
The value of (\log 50) can be calculated using logarithmic properties or a calculator. In base 10, (\log_{10} 50 \approx 1.699). For natural logarithms, (\ln 50 \approx 3.912). The exact value will depend on the logarithmic base you are using.
There are many ways of doing that in Excel. 50% is half, so it is the same as dividing it by 2. It is also the same as multiplying it by a half. Assuming you have a total in a cell, lets say cell A2, then these are some of the formulas you could use to find 50 percent of the value in A2: =A2 * 50% =A2 / 2 =A2 * 0.5
To calculate the percentage change from 50 to 35, you first find the difference: 50 - 35 = 15. Then, divide the difference by the original value (50) and multiply by 100: (15 / 50) * 100 = 30%. Since the value decreased from 50 to 35, it represents a 30% decrease.
To calculate 12 times 50 using money, you can think of it as finding the total amount if you have 12 groups of $50. Simply multiply 50 by 12, which gives you $600. This represents the total amount of money you would have if you received $50 twelve times.
Pi times 50 is approximately 157.08, since pi (π) is roughly 3.14. To calculate it, you multiply 50 by π: 50 × 3.14 = 157. The exact value can also be expressed as ( 50\pi ).
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To determine the pH of the solution after adding 30 ml of 15M NaOH to 50 ml of HOAc, we need to calculate the moles of each component to find the excess OH- ions. Then, we can determine the resulting concentration of hydroxide ions and use the Kb value of HOAc to calculate the OH- concentration, which can be used to calculate pOH and finally pH using the relation pH = 14 - pOH.
You cannot. The starting value must be positive for a percentage change to make sense.
absolute value of -50 is 50.
To solve the expression (-25 + 50 - 30(-12)), first calculate (30 \times -12), which equals (-360). Then, the expression becomes (-25 + 50 + 360). Adding these values together gives (425). Therefore, the final value is (425).