Calculate materials for and brickwork projects. Estimate blocks, bricks, mortar, concrete, and gravel needed. Input wall dimensions in various units. Use calculators for area, volume, and retaining walls.
Calculate , base material, and sealcoat quantities for paving projects. Input dimensions in various units and receive results in tons, cubic yards, or cubic meters. Estimate material costs based on input measurements.
Play and KenKen puzzles in five difficulty levels. Choose between classic and KenKen modes. Access daily challenges to progress from novice to expert. Solve puzzles with varying complexity to enhance logical thinking.
Solve equations with addition, subtraction, multiplication, and division. View step-by-step working to understand solutions. Handle mixed and partial fractions. Convert between decimals and fractions. Find factors of numbers or common factors.
Calculate optimal insertion length for umbilical arterial and venous catheters in neonates based on birth weight. Provide estimates for both arterial and venous catheters. Reference algorithm from Tambasco et al. 2021 study.
Analyze categorical and quantitative with summary statistics, contingency tables, and correlation coefficients. Create bar charts, pie charts, histograms, boxplots, dotplots, and interactive scatterplots. Color scatterplot points by a third variable.
Solve equations using two points, one point and slope, or coordinate values. Input decimals and fractions. View step-by-step solutions and plot results. Save calculation history and share final solutions.
Calculate confidence intervals for survey data. Input sample size and percentage to determine accuracy range. Compare two percentages to assess statistical significance. Determine required sample size for desired accuracy.
Perform complex calculations with support for real and complex numbers. Manipulate symbolic expressions and use over 225 built-in functions. Scroll through results with finger gestures. Copy and paste data for easy sharing.
Allows users to enter and save datasets, generate summary , calculate z-scores, and create boxplots and histograms. It includes a textbook with formulas, exercises, examples, and visualizations of key statistical concepts.