Mathematical Formulas and Concepts, Exams of Nursing

Download Mathematical Formulas and Concepts and more Exams Nursing in PDF only on Docsity! Pax math perimeter of a rectangle formula - AnswerP=2l+2w or 2(l + w) Peremiter of square formula - AnswerP= 4 x side Triangle Perimeter Formula - Answera+b+c (add 3 sides) Triangle Area Formula - AnswerA=1/2bh ( base times height, divided by 2) rectangular pyramid - Answera solid figure with a rectangle for its base and triangles for all other faces ( 4 triangles) Rectangular Pyramid Volume - AnswerV=1/3lwh Formula for perimeter of circle - AnswerPie times d (d is diameter) OR C= 2 x pie x r (r is radius which is half of diameter) Area is expressed in what type of units - AnswerSquare units (cm2, ft2, and mi2) Area of a parallelogram formula - AnswerA=bh Area of a trapezoid formula - AnswerA= 1/2(b1 + b2)h Apothem - Answera line from the center of a regular polygon at right angles to any of its sides. area of a regular polygon formula - AnswerA = 1/2ap ( a is length of apothem and p is perimeter) How is area of an irregular polygon determined - AnswerBy decomposing or breaking apart the figure into smaller shapes and then adding those areas together Ex if it consist of a triangle and 2 rectangles add the area of triangle to area of rectangles Pax math circle - AnswerThe set of all points in a plane that are the same distance from a given point called the center Circumference - AnswerThe distance around a circle Circumference of a circle formula - AnswerC=2πr (r is radius) Area of a circle formula - AnswerA=πr² Arc - AnswerPart of a circle connecting two points on the circle. Pythagorean Theorem - Answera²+b²=c² Hypotenuse - Answerthe longest side of a right triangle Volume - Answerhow much space an object occupies surface area - AnswerThe measurement of the outer surface of an object. Rectangular Prism Surface Area - AnswerSA=2lw+2lh+2wh Rectangular prism has how many sides - Answer6 How is surface area of a prism measured - AnswerAdding area of all faces and bases (best to unfold the image to see what shapes are included) How would you determine surface area of triangular prism - AnswerIt consist of 2 triangles and 3 rectangles So area of triangle (twice) and area of rectangle (3 times) Pax math What does it mean if data lies in the first quartile ? At the first quartile ? - AnswerIn = less than or equal to the median of the first half of data points At = equal to the first quartile What does jt mean if data lies in the second quartile - AnswerIt means between the first quartile and the median What does third quartile refer to - AnswerData that lies between 1/2 and 3/4 of the way through the data set (data that lies between the median and the median of the top half of data) Fourth quartile - AnswerAll data above third quartile If data lies in the ___ percentile it means ? If it lies AT ___ percentile it means - AnswerIn - lies in the range of the first percentage of data At - percent of data lies below data point Standard Deviation (SD) - Answerthe square root of the variance Variance of X - AnswerAverage of the squares of the differences between each data point and the mean of X Both variance and standard deviation are measures of - AnswerHow much the data tends to be spread out What does it mean if standard deviation is low ? High ? - AnswerLow - data points are clustered around the mean High - data is spread out, or there are a few substantial outliers Standard deviation only depends on - AnswerThe mean NOT mode or median The *histogram of the sample* represents - AnswerIf a sample is normally distributed, symmetrical or has measures of skewness or kurtosis Pax math Normal distribution histogram has the shape of - AnswerBell curve skewed right distribution ? Skewed left ? - AnswerSR- fewer data points to the right SL- fewer data points to the left Kurtosis - AnswerMeasure of weather data is heavy tailed with high number of outliers or light tailed with low number of outliers Simple even - AnswerConsist of only one outcome, like flipping a coin compound event - AnswerAn event consisting of two or more simple events. (One or more outcomes) What does a shaded dot on a number line mean ? Unshaded ? - AnswerShaded is greater than or equal to or less than and equal to Unshaded is just greater than or less than expanded form - AnswerA way to write numbers that shows the place value of each digit. Ex 7294= 7000+ 200+ 90+ 4 standard form - AnswerNot showing the place values ex 7294 When adding and subtracting fractions they must - AnswerHave the same denominator, numerators will be added/subtracted and denominators will be kept the same What do you do if you are adding or subtracting fractions and denominators are different - AnswerFind the Least common multiple so if one denominator is 6 and the other is 9 the LCM would be 18 so multiply 1/6 by 3 for both numerator and denominator and 4/9 by 2 for both numerator and denominator and then add What do you do when multiplying fractions - AnswerMultiply across for numerator and denominator Pax math What do you do when dividing fractions - AnswerMultiply and flip reciprocal so 1/3 : 3:5 becomes 1/3 * 5/3 and then multiply across What should be done when adding subtracting multiplying or dividing mixed fractions - AnswerConvert to improper fractions How do you convert a mixed number to improper fraction - AnswerMultiply the denominator by the whole number and add the numerator. The denominator remains the same ex 4 1/2 becomes 9/2 Composing fractions - AnswerAdding fractions with same denominator ex 3/7 + 2/7 = 5/7 unit fraction - Answera fraction with a numerator of one, it names one of the equal parts of a whole ex 1/3 = 0.3 1/8= 0.125 Decomposed fraction - AnswerSums of fraction with the same denominator ex 5/6 = 3/6 + 2/6 or 2/6+2/6+1/6 etc Explain what's done for PEMDAS with equation 8 : 4 + 8(7-7) - AnswerPerform inside parenthesis, which will equal 8 : 4 + 8 * 0 Since there are no exponents multiplication are done next from left to right 2+8*0 Finally addition Nd subtraction Answer is 2 Rational numbers - AnswerAny number that can be expressed as a fraction or ratio How do you convert fraction into a decimal - AnswerDivide numerator by denominator How would you set up the proportion for